best phono preamp under 500?


Graham slee products
Bellari VP129
music fidelity

others
dvdgreco
There's no such thing as "best" but I would definitely check out the new Musical Fidelity V-LPS II that is just going out to dealers in the US. It retails for under $200.
Lehmann black cube is worth a look. No longer <$500 new, but used examples should be well under that price.
I also love the Lehman Black Cube.The Vincent PHO 8 is also a great sounding affordable solution.