I'd say get a JZ Bh-2. It'll sound better than what the AKG and Sm7b are offering you. I sold my sm7 and I don't regret it, and I also used the akg many times, but I couldn't sing without my Bh-2. That's exactly in the 1000 range. This will pair extremely well with the GAP pre.
JZ Microphones - BH-2 Condenser Mic - eBay (item 350287615978 end time Jul-30-10 04:19:52 PDT)