I just bought an Epson Artisan 725. For the price, it's a good buy and has solid reviews.
I swore off HP inkjets after my last few dismal experiences with them. I'd say stick to Epson or Canon. I'm convinced that HPs are specifically designed to reduce your cartridge life and force you to constantly buy them.
I just recently bought a wireless Epson NX420 for 100 bucks at Office Depot. It's fully compatible with any Mac along with it's wireless printing. Plus, ink cartridges are only $9 dollars, and last me just as long as my expensive cartridges, while still having excellent print quality.
I got that exact same printer for free from Apple when I bought our iMac for the office. It is indeed a great printer but I'm wondering where you found cartridges for $9 ? Unless you're referring to refilled or compatible cartridges, they cost more than $9.00. I just checked on line and the genuine Epson cartridges are $12.00 each.