Epson printer profiles

I am using Photoshop CS3 (set to Adobe RGB (1998)) and printing to Epson Stylus Photo RX620 with Epson Premium photo papers. I set photoshop to manage colors and disable color management in the printer dialog. I have calibrated my monitor (Dell 1901FP) using Adobe Gamma software.

Since Epson has not created any ICC profiles for the RX620, does anyone have any suggestions for which printer profile(s) (ICC) to use?

I would have custom profiles made for all your paper/ink combinations. I use Chromix, but there are several good outfits online that can build good custom printer profiles for you.

Using profiles for other printers/inks/papers will probably not give you accurate results.