pod UX2, Pod Xt and Xt live are all USB1.1. The Pod 3 series is USB 2.0. the best part about those is all the amp models are included. over 96 amp models. These can be found for pretty cheap these days. I believe the HD series is also 2.0. These devices are much faster then the UX2.
The thing I like about X2 is that it comes with a version of TH2 that is really pretty good. It rivals the Pod amps for quality. I use Pod pro 3 which is a rackmount unit that has USB2.0
The other nice thing about having a newer Pod is having access to Pod Farm 2. Much better then Pod Farm 1.
I know it is a matter of switching audio devices when you record your guitar tracks. you may just need to use the 2496 and use the plug in for pod farm. You need to plug in your UX2 to unlock Podfarm so it will work as a plug-in. That is what I did when I had my UX2.
The V-100 is my main interface. I plugged in the UX2 to unlock the software. It was never used to record anything.
Just copy and paste the dll files from the line 6 folder into the default cakewalk vst folder and you should be good to go. Use pod farm as a plugin from within sonar and avoid the ux2 all together.