phono pre amp choices?


Now I am deciding whether to upgrade my phono section. I am using the phono section on a Belles 28A, which is not bad but, I'm told could be improved upon. As with most of this stuff there are alot of choices.
I see an origin live unit for sale with many adjustments, others that are much more costly with none.
What are the determining factors in a quality phono pre amp? Are they as subjective and based strictly on opinions, or is there a relatively cut and dried, scientific platform, like, you get what you pay for.
Thanks in advance for the help.
mrmatt
Thanks for the responses. My system is Examplar Audio tube pre amp, Belles 350a mono amps, usher BE-10 speakers, Kuzma stabi s TT. I'm going to be upgrading my cartridge at the same time. Budget is $3K for phonostage, $2K or so for cart. Thanks again.
I am using the Blue Circle 707 which is quite good and within your budget. The Dynavector 75 is a steal at $750. I am a small dealer and these are the two I picked out last fall to carry solely on the basis of sound for money.
If you have $3K to spend: Look no further - get a Modwright 9.0 SE tube phono preamp. You won't regret it.
You might be able to get a used one for much less.