I've tried several phonostages in the $6K and under class. I would say my current favorite is the CODA 06X FET, with the Musical Fidelity Nu-Vista Vinyl just behind it. The MF is technically a tube phonostage with the Nu-Vista tubes, but those are not like the classic glass-body tubes.
For the classic glass tubes, I have a Herron VTPH-2A, and also a Bigbottle BB3. Both of those units use RCA loading plugs for impedance, and have fixed capacitance.
Fixed capacitance is not ideal for me, since I have several MM carts, which vary in desired capacitance loading. That's why the CODA and the MF get my overall nod, since they have switchable capacitance loading options. The CODA has internal DIP switches for loading, whereas the MF loading is handled with switches on the front panel - very convenient. Both units have the option of XLR/balanced or RCA/unbalanced outputs.
Anyway, for overall sound, I like the CODA best. It has gotten me interested in the CODA line of other amps/preamps.