Phono Pre Amp?

Try the Cambridge 640p. It's worked well with both a Goldring and now a Dynavector cartridge. Retail is around $180. You can also have it modded down the road, if you so desire.

Under $300, I love the 640. For $400, you may find a creek or even better?

I tried the Bellari, way too tubey for me.

I went with a Graham Slee SE2 which does MM and high output MC, retails at $400, but you can probably get a deal on one....it's a TAS Recommended component in their latest rag...if it doesn't beat anything up to $1k I'd be real surprised.

My first pick would be the Eastern Electric MiniMax tube pre, it sounds absolutely amazing!! But comes in at $1200 I think it is (less used)...now that's a giant killer!

L'wood

Another vote for the Cambridge 640P. They're not even $180 unless you're talking about shipping. They're $169 pretty much anywhere, including Audio Advisor and MusicDirect.

This thing is incredible. It has a lot of the performance you don't usually get until you pay some serious money, such as a very high s/n ratio (the noise floor is LOW!), linearity, speed, and frequency extension at both ends. You will hear a significant improvement over your NAD, and may not hear much more improvement beyond the 640P until you get to a Graham Slee Era Gold Reflex at $925.

I was playing my analog rig into a vintage but highly respected Amber Model 17 preamp. The Cambridge created such a jump in dynamics, resolution, speed, and extension that I ended up upgrading the cartridge, line stage/amp, and speakers to exploit the 640P's potential.

You've been warned. :)

I would vote for the Bellari VP129- great sounding little tube that I have seen used many times here on audiogon for under $200 usually.