Tell us a bit more what you consider a good price (the top end of your acceptable range would probably be a good place to start).
Do you want a console unit, or a wrist unit? Wrist units come in either 'hockey puck' style (VT3 & VT 4) or wrist watch style (Atom 3.0); pucks are easier to read, watches can function like watches. Air integrated? If you want an air integrated wrist unit, it's probably going to involve a wireless transmitter that adds about $400 to cost. Do get a computer that can handle nitrox.
Let me lay out some in a particular brand that I'm a little more familiar with.
1.) A low cost console - Oceanic Veo 3.0. Can be console or hockey puck worn.
2.) An air-integrated console - Oceanic Pro Plus 2.1.
3.) A low cost wrist watch style - Oceanic Geo 2.0.
4.) An air-integrated watch style - Oceanic Atom 3.0 (like a Geo + air integration, from what I understand).
5.) An air-integrated hockey puck - Oceanic VT 4. (You can find the older VT 3 cheaper).
You can compare these computers at DiveNav.com; they're got a research page and you can have it list their features side-by-side.
Be wary some computers are sold without the roughly $100 PC Download with with a proprietary cable you'll want to put your dives on your computer. Not all dive computers have the option for a download kit.
Scuba Toys is an online outfit that's reputable and I think gives a discount if you point out that you're a member of this forum. Looking at their site, and without factoring in any discount, prices on these would be:
1.) Veo 3.0 - $439.95 (wrist), $539.95 (console), $589.95 ('nav con console' -
2.) Pro Plus 2.1 - $599.99 (add about $100 to get Quick Disconnect, which you may well want).
3.) Geo 2.0 - $429.95.
4.) Atom 3.0 - $999.95 (with wireless transmitter).
5.) VT 3 - $699.95 (with wireless transmitter).
6.) VT 4 - $1,199.95 (with wireless transmitter).
That's not all the Oceanic line, and I'm not saying Oceanic is better than Aeris or other competitors. I'm just trying to narrow it down to some product categories to help figure out what you might like best.
You can often get a good 'package deal' on gear, Black Friday's coming, and if you also need a BCD, reg., etc..., I think you'll find Scuba Toys might be willing to discuss substituting parts of a package (at least they did with me in late '10 & I got a sweet, sweet package deal).
Is a Geo 2.0 too expensive for you? What features do you insist on?
Richard.