Analog digital converters


Can anyone point me in the right direction here. Was trying to find out information on A/D converters. Have a bunch of old concert tapes that I wish to convert over to digiatl format. Tried searching the forums and nothing looked good.
inwanw
I use an M-Audio Audiophile USB outboard sound "card" that I found on eBay and paid well under $100 for. However I would love to have an Apogee Rosetta 200 one day, for well over ten times the price. In between, my choice would be an Apogee Mini-Me with USB.
Wadia makes a pair of units:

http://www.wadia.com/products/w130and150/130_150_home.htm
Folks,

Thank you for the suggustions. I think that there are several good ideas here. As to the issue of quality these tapes are old Grateful Dead recordings that are more for history that anything. But in the furture I think that it would be good to be prepared with equiptment that will give a good quality digital recording.
I did see the Wadia but I have a hunch that that maybe out of my price range the Apogee equiptment may fit in but tight. I do like the fact that the one is both a A/D and D/A. makes for one piece of equiptment.
is the concensus that 24bit/192kHz converters are required to fully realize the potential of lp's? they all seem to be more than $2K.