James, don't just purchase any ics because of price etc. There are two very important criteria.
1) As low of cable capacitance as possible. Try to find the capacitance from a manufacturer before purchasing.
If you can, try to find the inductance of the phono cartridge. If a figure is not given, try to find the dc resistance
of the coils. I can help you figure the inductance from your results if need be.
Here is a link that can give you an idea of the frequency response to expect if you do find the inductance and
the capacitance of a possible cable. Maybe play with values to help you see the effects.
http://www.hagtech.com/loading.html2) Try to find an ic that uses 6N pure copper wire if you can. If you want silver or other, at least attempt to keep capacitance as low as possible. (Make your own if you can.)
Hope this helps James.
steve