This appeared to get stuck in my outbox, so re-sending:

I agree with Dan's comments about USB turntables.  They are designed for people who want a cheap and cheerful way of transferring vinyl to their iPods.  They are definitely not designed for audiophile quality archiving.    There are still plenty of good brand new quality turntables out there.  On the budget side both Pro-ject and Rega sell highly regarded products, but all require a phono stage.  I have a 19 year old Rega Planer 3 that is still going strong (fitted with the long discontinued Linn K9 cartridge).  I only have one rarity, the IGUN grey vinyl.  I recorded it to a 16bit WAV file some years ago, but it has a few loud clicks at the beginning (easy to manually remove).  The over-all sound quality is probably no better than other copies out there. 

As for 24bit/96k sampling, many current audio cards will do this, but again it requires pre-amped output from the turntable.  This can be achieved by using the ARTcessories USB Phono device (I have one too) only as a phono pre-amp, not a sampler.  This is because it has analogue output as well as USB (i.e Turntable > ART device > Computer sound card).  One day I'll have a play around with this. Time, I need more time!

Cheers,
Mark H