I use one of the Flashforge printers. The dual extruders are nice for always being able to have 2 colors loaded, but it doesn't work well for printing two colors at once like you'd think. Also, while the price is much cheaper than other comparable options, you're using web communities for support. The support guy in China is nice and helpful but sometimes things are a bit lost in translation.
I always print in PLA with it and have been happy with the results. There was a lot of learning! The quality of the plastic also matters. I've been buying from makergeeks.com and their stuff is awesome (and from MO).
http://www.amazon.com/FlashForge-Printer-New-Model-Structure/dp/B00I8NM6JO/ref=sr_1_1