I have been using my UNO32 for a couple of months and I agree, if you need more power, it beats the Arduino hands down. Diligent did a very good job of setting up the IDE to look and feel just like the Arduino and I found it very useful in running easy projects where speed is needed.
Given the low cost, I doubt I would bother using the old Arduino on new projects. For the same price you get so much more.
