Your off to a good start simply by getting on these forums and asking. You don't have to spend a fortune on equipment if you know what to buy and where to buy it. Don't get sucked in by your local dive shop who's only interest MAY be getting rid of their inventory. Learn everything on the web and tell them what you want -- don't ask. A dive shop owner/manager/cashier/instructor doesn't make them a surpreme authority in equipment (or training for that matter). If they don't want to work with you, there are plenty of good online shops with awesome prices and service.
That being said, my recommendations are as follows:
Mask: Low volume, good quality.
Snorkle: I don't own one, but I beleive they are required for your class (don't ask me why). I'd say get the cheapest out there (used) then toss it.
Fins: Scuba Pro Jet Fins
BC: Halcyon 27lb wing, harness, and aluminum back plate. Dive Rite will work, and I understand OMS now has a NON BUNGIED wing as well. Don't get a wing with bungie cords. This is my most important recommendation as this harness/BP/wing combo is unbelievable in simplicity and efficiency (and often times cost too). The last one you'll ever have to buy.
Tanks: 2-AL 80's
Regs: Apeks TX 100 with a TX40 back up. Donate the reg in your mouth and keep the back up on a bungie cord necklace around your neck. This is the second biggest peice off advice I know of.
Computer: I'd look around for a used Uwatec Aladin Sport or Pro.
That's it. Check the archives on various boards and read, read, read! Pay attention to DIR discussions. I recommend you at least learn about DIR, and if you don't like it -- fine, but at least you will have heard about it before you go out and buy $1300 in gear. I wish I had.
Some links:
http://www.gue.com -- Read equipment section.
http://www.wkpp.org -- Read equipment section and pics.
http://www.sfdj.com/dive/dir1.htm -- Download both DIR 1 and DIR 3. This is good stuff.
http://wrolf.net/index.html -- Scroll down and read all the hogarthian and DIR stuff.
http://www.sfdj.com/dive/dir1.htm -- DIR shop.
http://www.diveinn.com -- Good prices.
Good luck.
Mike