regarding the amp modelling, I'd recommend anything by tech21, they were the first on the scene and use 100% analogue circuitry. The Sansamp GT-2 is a good start, or the classic model for added flexibility, they work like a dream when you run them into an amp too.
From what I've read they may not be the most flexible, but they're the best at the stuff they DO simulate. No FX or reverb or anything, but the amp sounds are top notch, you can get most boogie, marshall and fender amp sounds out of em. and they sound better DI-ed than anything else I've heard. WAY less digital!