The type of op-amp you choose is likely to be determined by the operational paramaters you wich to see. Do you need a rail-to-rail amplifier, a single or dual supply, single, dual or quadruple, offset correction, etc.

Basically, a 741 would not be an option for this application, but I guess you already thought of that, too, and had a peek at what Burr Brown offers, just to name one.

Nevertheless is it my opinion that such discussions do not belong in this forum as there is no direct connection with you problem (just fire some questions on the A/D converter you use and I'm happy).