Have a Line6 ux2. Happy with the interface, their solution to allowing you
to play through your effects but still have close to zero latency, even on an old machine is brilliant.
Pod farm is ok. Easy to use but has some silly restrictions in it. Eg. Can only have one type of each effect in your chain at a time (no having two distortion pedals in a row) and many of the effects positions are fixed (can't have reverb first in the chain). When this is a problem, I record both wet and dry and screw with the dry version later.
Still, worth it I think, especially as their seem to be some ridiculously cheap deals on some of ther interfaces at the moment.

