Jvos:
I would go with an 11.5, it is suitable for both positions.
I reccomend both Kelley and Pinckard. They both are of great quality and are very competitively priced.
www.kelleyusa.comI reccomend the Elevation series - ES832 ...can be bought in tan or black. The black series is a quick break-in glove and I believe they get floppy and wear out too quickly.
www.billpinckardbaseballgloves.comThe website looks homespun because it is a small operation where Mr. Pinckard often answers the phone himself. The gloves are excellent.
Another great resource is
www.ballglovewarehouse.com where you can search almost any glove by brand, position or size.