Hmm...tough call. The Vincent phono has received a lot of praise, especially for the price. Your TT may be the "weakest" link. Getting a new phono stage would be easier though, since you wouldn't have to remount your cartridge. Try the PS Audio with their 30-day audition period and find out if it makes a big enough difference. Also in your budget are models from Modwright, Tavish Audio Design and the Gold Note PH-10.
For turntables, the Well Tempered Simplex MKII. Amadeus MKII, and some EAT TT models are also within you budget and are well reviewed. Good luck!
For turntables, the Well Tempered Simplex MKII. Amadeus MKII, and some EAT TT models are also within you budget and are well reviewed. Good luck!