There are 2 types of hybrids. One is based on mtb configuration and one is based on rb geometry. For your commuting distance/height/weight I would recommend getting one that's based on a road geometry. 700 wheels. 28-32mm tires. 26" wheels will take you forever. An early 90s Specialized Crossroads would be ideal. If you can find one they are very reasonablely priced. The 6 speeds have a 48tx14t top end and the 7 speeds have a 48tx12t top end.

The main thing is to get a bike, get out there, ride and live w/your choice for a while. Accessories you may want to add over a period of time are a rack, panniers, lights, a good saddle(Brooks B-72 if you can find one on the cheap), full coverage fenders...oh wait you live in San Diego, nevermind.

For your toolkit a Topeak Road Morph w/gauge framepump, Park MTB-3 Multi-tool(has a chaintool included), tire levers, tube(s), patchkit, wb cage(s). All are available from http://www.bikeisland.com w/no shipping charges.

When you get 'running lights' http://www.pricepoint.com has blinkies and dual-mode headlights for 9.00 per. The brand name is Sette. They're just as good as lights costing 3x as much. Good luck and have fun putting your rig together!