Whow, lots of interesting directions. A lot depends on what you are looking for. I think your idea of the Super-T amp is daring.. and would take you into adventurous territory. It is only about $130 at Parts Express, and you could experiment with full range hyper sensitive drivers, such as those offered by Audio Nirvana (http://www.commonsenseaudio.com/nirvana.html), for about $150 a pair- all you would have do to is find an enclosure for an 8 inch driver- or build your own based on the plans Audio Nirvana offers. You might end up with something special.
For a more conventional direction, I second the recommendations for a small creek integrated, which is going to be a big improvement over your NAD... but only if you upgrade the source too... like with a Lite DAC. Speakers... a lot of people are recommending Vandies... and that is for a reason.
Good luck
For a more conventional direction, I second the recommendations for a small creek integrated, which is going to be a big improvement over your NAD... but only if you upgrade the source too... like with a Lite DAC. Speakers... a lot of people are recommending Vandies... and that is for a reason.
Good luck