i have a couple jolida integrated amps and they are very nice sounding. i use the 1301 and 1701 hybrid jolida's with some tube rolling. The 502 is a very nice amp. another couple of integrated amps to audition are: prima luna, mcintosh "MA" series (i owned the MA-6500), classe "CAP" amps, and the new stello. i think any of these amps are a step up (if using the ma-6500, ma-6900 or the new 7000 mcintosh integrated it would be a huge step up) from your NAD components. for the price and smaller power, the jolida amps are very nice.
