This behemoth at work has a 512M quadro fx 3700
My somewhat ageing yet still functional machine at home has a 320M geforce 8800gts
As a point of note... I've had one gaming card go bang on me after I switched cooling heatsinks, so no real surprise!
However, here, within a year we've had several of these quadros go bang all on their own. I wouldn't recommend them for Terragen anyway, but if you do want a quadro for other purposes, video editing etc, don't get that one imo. Least not in a Dell, lol.