No what I really think is that he want's something that is available, inexpensive and easy to use... He didn't say anything about rail to rail, I did, I have a great deal of doubt as to whether he at this time in his education even is aware of what that means, as to the inputs going to ground, that is really an issue with early op-amps like the '12 -324 and the '358 series and again I mentioned it not him. A simple low-drift op-amp nothing real special would get him working well enough to evaluate the future directions he might need to go and at least make some measurements. Just slamming into an Instrument Amplifier without at least some prior experience with both OP and Instrument amplifiers would surely be a recipe for a small disaster and certainly not a guide to certain success. In my somewhat experienced opinion.
Doc