Depending on whether you have a Mac in your system, a pro-audio interface with Pure Vinyl providing the RIAA eq, can be a nice cost effective system.
I have a Focusrite Saffire interface that I have been using with an Ortofon HMC30 cartridge, that I have been pretty happy with.
I'll second that as a valid option...
For PC you can use Diamond Cut software...
Or there are several VSTplugin modules available which do RIAA
I use a PC with e-MU 1616m - the microphone inputs work fine - all that needs adjusting is the loading, which can be achiever with a parallel resistance.