I think for the money the ms2000b is the best choice.
They're all different and cool in their own ways, but for $500 or whatever ridiculous price an ms2000 goes for these days, you can't beat it. I paid $1024 for mine and I'd never sell it.
Yeah, it doesn't look that great comared to kurz standards...
This however... I'd really like to check out!!!
http://www.kurzweilmusicsystems.com/whats-new.html?Id=1542
Firewire = IEEE1394
It's an interface. Like USB but faster. It was created by apple, but is now used on both platforms.
Do a google search for more detailed info.
I'm gonna buy an external HD today...
100gb or so, firewire...
What is the best model for speed and reliability?
What amount of cache do I need to look for, and are there any other specs I need to look for?
A good number of games don't have to be reinstalled, but most applications will have to be.
It's really best just to back up all your save files and important stuff, wipe it all and start clean.