I've used the UX1 before, I think it will suit your purposes fine.  Just remember that you are using your computer's CPU to run everything.  I just bought the PCIe upgrade for my 24i... it's actually the first real upgrade (other than computers and software) that I've made since I put the system together.

POD Farm is nice for re-amping. I usually record a dry signal along with the modelled one and if I find that the modelled one is not exactly what I want, I can experiment with the dry signal and POD FARM until I get it just right and I don't have to redo the performance. The platinum license of POD FARM that comes with the X3 gives you every model and every preset present on the actual physical device.
 
It's a lifesaver if you nailed the performance but the tone was a little off.
 
(Message edited by honninscrave on January 20, 2010)