Well from I have read I think everyone has hit the nail pretty much on the head..
I would as other suggested get a good regulator set up, if all your diving is air the need for a computer is mute as long as your comfortable with your divetables, however if you do Nitrox dives then absolutley go with a computer.
If you use wrist mounted or console is strictley a decission you make based on your prefrence.
While I and all of my core group of divebuddies use wrist mounts we also have a SMALL 2 gauge console as a redundent back up (ELECTRONICS DUE FAIL).
When choosing a regulator I would suggest that you factor in the number, types and locations of the dives you plan to do, discuss with several independent soures (other than the dive shops) and see what you can come up with almost every manufacture has a demo program where you can touch it and breath it.
ABOVE ALL ESLSE REMEMBER THIS IS YOUR LIFE SUPPORT SYSTEM. AND YOU GET WHAT YOU PAY FOR.