Basically, any variety of Epson that can handle pigmented inks (like Epson's Durabrite inks).
Other than that, it's your call if you want a wide printer (that can do more than 8.5x11 transfers), which would of course cost more but let you print large designs. Also check for compatibility with any bulk ink system you may want (or possibly want in the future).
To add a little information onto what Twinge just said, you can also look into a few of the Epsons that do not come standard with Durabrite pigmented inks. The R300 and R320 for instance are Dye based ink printers, however for those models you can get a Magic Mix bulk ink system.
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