Go with an Epson or a Canon printer. $400 isn't going to get you far in the fine art digital printing world but you could get a very nice 8x10" printer for that price.
Epson has the 1400 which is a 13" (on the smaller side) dye ink based printer and it's $300 after rebate. The Epson 1800 is a 13" (on the smaller side) pigment based printer but it is $449 after rebate.
The advantage of the dye inks are richer colors because of the wider gammut. The advantage of the pigment inks are more fade resistant than dye inks. Plus, the 1800 has a glossy optimizer cartridge will make those prints really shine if you are printing on glossy paper.
I really don't know much about Canon printers. Visit
Canon for more info.
If you are doing fine art work, a pigment based printer will be best for you.
I don't own either. I don't like most digital prints. The quality just isn't high enough for me yet. I could check to see what photo printers we have on display at work and see if I can tell the difference for you between two printers of your choice. We keep pretty up to date. I know we have the new Epson 3880 on display. I shouldn't have a problem getting some test prints done for you.