We use compatible ones from IJT and have no problems with them.Our printer is DX 8450,and the cost of the Epson cartridges has gone up so much, we buy these all the time.Hope this helps!
I've been using the "new generation" of compatibles from Phoenix for some time with my Epson DX8400, and have had no problems. Prior to to that I was getting big problems with cartridges not being recognised.