phono pre amp giant killer?


I'm in the market for a used phono pre amp. I'm considering the pro-ject tube box II and the clear audio nano (because of some positive reviews and the fact that I use a Clear audio Vertuoso Wood Cartridge). My question is how much do you need to spend on a used phono pre amp in order to get to the level of truly top flight performance? My budget was going to be 350 but that may change with this thread.

thanks
andy
andyth
If you just need MM, then check out the Yaqin MS-12B, change out the horrible tubes for some NOS and you will be rocking in no time.
How would the phono stage in a fully-restored Threshold SL-10 or fully-restored ARC SP-6 compare?
Sorry to resurrect this , but I believe this is very important topic and thread should survive as more sleepers are being discovered by vintage audio adventurers.
Here is a list of worthy vintage phono preamps:
Hitachi IA1000
Sansui AUG90X
Sansui 3000A
Sony STR-6120
Leak Delta 75
Yamaha CA-800II