I'm skeptical of the Solidoodle. Why on earth is it so cheap? And it looks of such high quality.
It doesn't specify what the head speed is, so think "slow". 50mm/s, if that.
http://renaissance-engineer.net/2012/03/08/how-time-flies/
"A review of the Solidoodle after numerous hours of printing. But for a few tuneup adjustments here and there, it has been problem free. If only there was a heated build platform the prints would be totally awesome (instead, as you might expect with ABS on a cold piece of acrylic, the first few layers are not even)."
I might take the plunge and get the $549 version. Although I must admit, I have no idea what I'd make with it.