I own an 05 OCR3. I used it for my commute (15 mi each way) until I built my Surly cross-check. The OCR3 is a solid bike, rides well, and should be an excellent commuter for you. I just have this thing about building things, so once I got into cycling I had to build a bike from parts. I still have my OCR3 and use it for road rides since the cross-check is a single speed.
The TCR is more race oriented and therefore will have better components. The OCR being more of an entry level bike will probably give you more options (fenders etc..). I think the wheels on the OCR will probably be more sturdy (32 spoke) for commuting also.
Either way enjoy the ride...
Weighing in from Austin TX.