Wait, don't you have BIAB? If so, you have a great emulation of a Twin Reverb right inside of Amplitube that ships with BIAB.

DO NOT BUY AN AMP YET - until you have fully sussed out Amplitube that comes with BIAB. VERY quiet, and you'll be able to dial in tone galore.

Or, have an iPhone or iPod touch or iPad? Get the freebie Amplitube Fender Free app and spend $39 or so to get the iRig interface.

Seriously good Fender tone in there. Just listen to this on the PG Music site with Brent Mason real-track going through Amplitube http://www.pgmusic.com/amplitube-demos.htm (scroll down to where it calls out Brent Mason - first one).

I can't get any of the direct input parts to play in my browser on either FireFox or Chrome - but you have a great amp simulator in Amplitube - and it weighs nothing. Unless you plan on gigging, save your cash.

Let the nay-saying begin about authenticity of tone and what not - I'm a loud and vocal proponent of amp simulation of all flavors and it's great that PG includes Amplitube with BIAB. It's the best known amp simulation software out there. Let the fact that Moore's law turned out to be true and use the power of your CPU to simulate the tubes.