More specifically, I'm just looking to weigh as many options for a new amp as possible. Of course I'm not asking anyone here to list every amp in the world in that range, but hopefully a brief list with reputable/popular amps. Tube or SS is no difference to me, since I will most likely end up researching any and all amps that are suggested to me anyways.
To be even more specific, I've got a NFB-12 that I am using as both a DAC and an amp. There are no problems with the amp portion, I am simply looking for an amp out of curiosity. Seeing how I can change/improve the sound on my headphones. This setup will also solely be used with my pair of K701's. I plan to have my future setup looking like this:
PC->NFB-12 DAC->*AMP*->AKG K701
Now doing a bit of searching on forums, with the somewhat hard to use search feature, I have so far only come across the Matrix M-stage, which happily sits within my budget. However, I feel it is a bad idea to buy the M-stage without finding other competitors first. Kind of like buying the first car that happens to run and is in your budget. Hence, I come to you guys.