I'm looking for a replacement controller board. I tried few Rumba boards, but the usb chip of all those failed. (A common problem by my google search.)
I also tried to buy a RAMBo board (greetech 1.2G) but it wouldn't connect at all. (stk500v2_getsync timeout, another common problem.)

I would like a board that's reliable and works well and supports dual extruders. Any ideas?