Your $800 budget is on the thin side. I've not heard the Samsung HTIB that c/net reviews favorably. I do know most of us posters here wish you might consider putting pieces together yourself. The amp/receiver is no problem. Just go to the c/net reviews & click into "entry level receivers." Any of the better reviewed ones will do the job. Thankfully, progress has given us continually better value for these basic audio products. You don't need anything fancy.
Now, speakers are the harder part. Not really hard, but less convenient. Our consensus is that dedicated specialist speaker makers simply do better speakers. There are lots of brands. One of the more accessible brands is JBL, a long established maker. We have an experienced JBL advocate here who could chime in with links. The reason is that JBL superceded some of their fine for all normal folks speakers by introducing a newer line. That reason produced a source for exceptionally good values as some online dealers had a good supply for about half their former price. I don't know if there are any supplies left of them. If the informed don't post, Googling might get you to good sellers. They were the Northridge series I believe.
You see, not much over 200 bucks gets an acceptable receiver, leaving almost 600 for speakers. In fact, check for high quality A/V dealers in your town (hopefully large) that take trade ins. Here in Albuquerque (1/2 million) a dealer does that & always has at least a smattering of used goods that range around 50% off original price. You see, good speakers don't tend to wear out in the usual sense of the word.
It'd be nice if our speaker source guys would read & post links. I am convinced 200 for a receiver & almost 600 for speakers can get better sound for you than the pre-packaged ones. With a little patience this can come together for you to enjoy for many years.