The idea of a truly portable DAW application has obvious appeal, especially when that application costs as little as EnergyXT. But can you really carry everything you need to make music on a USB Flash drive?
You can get a lot of audio interface for your money these days. The latest from ESI offers 18 ins and eight outs for a very reasonable price, and could be ideal if you need to record lots of sources simultaneously.
Put simply, if you want to send lots of audio inputs into your computer simultaneously, but don't want to pay too much for the privilege, the US1641 could be exactly what you're looking for...
With unlimited audio tracks, support for VST and Direct X effects, and an intuitive interface, Acousticas Mixcraft offers a lot of recording potential for not a lot of money.