I'm running a IDA-X100 which I like quite a bit (since all my audio stays on an iPOD or USB drive). I'll be running a Sundown 100.4D, and some decent components (thinking maybe DLS R6As), plus eventually a single 10" sub. I plan on keeping the components passive (at least for now).
Since I want to get solid SQ, are there any downsides to the PXA? The cost isn't really much in the grand scheme of the whole system (I see them for ~$75-85 pretty regularly). I understand it also lets you run the KTX outboard tuning system.
Big differences in SQ? Is the KTX some good Voodoo or do you really need a audio pro do dial it in?