I've been bringing this notebook up a lot lately, but I do think the base 15-inch MacBook Pro could be worth a go. You might want to pick the 160GB drive option if you go that route, however, and 2GB of RAM is definitely going to help performance. But you'll get a fairly decent, if basic, video editor (iMovie), music editor (GarageBand), and DVD authoring (iDVD) suite out of the box. And you actually get a faster CPU than the Dell as well as more hard drive storage.
Don't worry about hardware support on the Mac in this case: you're guaranteed to have a solution for bringing over much of the old audio.
If CPU power isn't as important, the HP dv9000t might be worth a shot. It tops out at 2GHz at best, but you can custom-order it with dual hard drives if that's your thing. It's bigger than the MacBook Pro (17 inches) but still manageable. The 15-inch dv6000t would actually be a pretty bad choice as the screen is only 1280x800 without the choice of an upgrade.
I am in the difficult process of selecting a laptop for multimedia applications, video editing, HBS to DVD, old 33rpm records to CD/ DVD,etc. I know I need lots of memory and HD capacity. I have been looking at the DELL XPSM 1710 wich is very expensive. Is there any other option that can give the same perfomance at a lowe cost?
What would you recomend