So are you looking only at laptops? If you are, anything where you need an i7, 8GB of RAM and discrete graphics means that it'd be better suited to a desktop. Those kinds of specs mean either gaming or photo/video editing, all of which is pretty much guaranteed to kill a laptop within a 18 months.
Also, speaking as someone who spent about 3 years as a professional Apple repair tech, along with Dell and Toshiba and a few others here and there... Apple's reliability is no better or worse than anyone else's. However, Apple does make it next to impossible these days to upgrade any of their laptops. First you need a specialty screwdriver, then you find that the CPU, GPU and RAM are all soldered directly to the logic board. The next unwelcome surprise is the proprietary SSDs they use, meaning the one thing you can actually upgrade costs more. Oh and the battery is now glued to the bottom case and is one unit essentially. Where Apple gets you is on peddling their extended warranties, same as any other computer maker/seller and if you think the average laptop repair bill is steep, you haven't seen anything yet. A new logic board for a MacBook Pro can cost more than a brand new unit at retail. Plus Apple has illegally divided up the repair business between its own retail stores and Flextronics, which runs its repair depots. Apple actively bullies and flat out abuses any smaller "authorized" repair shop that poses even the tiniest of threats to any of its retail stores. I was on the receiving end of it for about 3 years. One of Apple's middle management types apparently seemed to think that I worked for Apple, not the company signing my paycheck and got rather tetchy when I told him to stop ordering me around like I was his subordinate.
I would personally recommend getting a nice desktop. The Dell XPS 8700 would probably fit your needs quite nicely and right around your budget range too. I just upgraded to an 8700 after my previous 8100 served me very faithfully for about 4.5 years. It's now my ridiculously overpowered HTPC. If you absolutely must have a laptop, it doesn't really matter what you pick, it'll be dead in about a year. It's just simple physics colliding with unrealistic consumer demands. Consumers want laptops that are thinner, lighter and faster. The first two mean shrinking the size of the chassis, which when coupled with the additional heat generated by the third, leaves said heat little room to expand. So you get these big pockets of hot air just sitting around slowly baking your internal components until the solder joints dry out, crack and start causing all kinds of fun. PC makers tend to skimp on the fans, Apple deliberately throttles the fans to cut down on noise. D@mned if you do, d@mned if you don't basically.
Clever and enterprising people can figure out how to use a cheap netbook or chromebook type computer to act as a remote terminal to a much more powerful desktop. Which can work surprisingly well for anything that isn't gaming.
I need a Windows computer for a designated work computer, and it HAS to have a dedicated video card. I want an i7 processor and 8 gigs of RAM. Due to the nature of my work, it also has to have a backlit keyboard...easy enough, right? WRONG
I have looked at all sorts of models from different manufacturers and I cannot find a single one that is consistently reviewed high enough for my liking without going over my $900 budget. Mac on the other hand, all of their stuff has 4.5 stars with thousands of reviews posted. People always tell me I paid way too much for my Mac, but ya know what? I can't seem to find a comparable Windows option without coming damn close to the price of a Mac, and when I bought the Mac I didn't have to sift through tons of horrible naming systems like "Series GE model C10" to find the right model for me, only to find it gets horrible reviews on reliability. I understand the bad experiences are going to stick out more often than good ones, and every model is prone to issues, but I just can't seem to find Mac reliability and quality in a computer under $900.
So...am I looking in the wrong place? I need help! I was looking at three brands that everyone seemed to recommend: Lenovo (I like the Y410P...but I saw quite a few reliability complaints), Asus, and MSI. Am I overlooking some good machines under $900 from other brands? If anyone can recommend some models for me to check out I would GREATLY appreciate it!
Please give me your advice.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic