Phono stage good for classical and jazz?

If you can find one in good shape, I can highly recommend a vintage Quicksilver full-function preamplifier. The phono stage has sufficient gain only for high output cartridges (2 to 5mV), but the performance is top drawer. They can be found for $900-$1100 when in perfect shape. And in the bargain, you get a great linestage. The unit is built like a tank and sports a very high quality power supply with tube rectification, choke-loaded input filter, etc.

In order so that we can provide you with a useful answer, please describe the rest of your system: what TT/tonearm/cartridge, amp/preamp, speakers and your room?

+1 to BR3098's question.

In particular, without knowing what cartridge(s) you plan to use it's impossible to say which phono stages would be suitable. For instance, the Quicksilver mentioned by Lewm would be suitable for MMs and many HOMCs, but would be inadequate for a LOMC (as he noted).