Unfortunately, I haven't seen benchmarks of the mobility product. In fact, I haven't even seen benchmarks of the desktop product
I can try to get you an idea though, here's what my research has turned up so far (all desktop-oriented):
The Quadro FX 500 (The M60 uses the FX700 and FX1000) is based on the GeFOrce FX 5200:http://www.xbitlabs.com/news/video/d...623164605.html
And here we have a picture of an unnamed Quadro based on the GeForce FX 5600. No identification of which Quadro it is is given though:http://www.xbitlabs.com/news/video/d...306023246.html
Here's a page with three actual benchmarks of the Quadro FX700 Go. Yes, the mobile part! This is the lesser of the two video cards available as an option in the M60:http://www.inition.co.uk/inition/pro...adro_fx_go.htm
Unfortunately they don't give anything to compare those three benchmarks to, and they're proffessional benchmarks not games.
Here's some icing for your cake: Actual benchmarks of a Dell M60 vs a Dell Inspiron 8600. The only downside? The M60 is using the Quadro 700, not the 1000.http://www.extremetech.com/print_art...=114617,00.asp
I'll leave it with those benchmarks, since I doubt I'll find better. The 700 chip keeps up with the 9600 quite well in many benchmarks, though in a few the 9600 is 2-4x faster. Those appear to be isolated to only some benchmarks however as in most games the 700 holds up surprisingly well.
So, now to make a decision, two things must be taken into account: how much faster the 1000 will perform, and how much more that will cost you.
I'll now do a price-comparison between the M60 and 8600. Everything I will configure as close as possible between the two, except of course the GPU. Everything else is the same (They even both have 15.4" screens. Also please note I added stuff like the DVD burner that I normally wouldn't add, because it was the only optical drive both shared. I picked the 80GB drive because you said you do video editing so space is important):
Pentium M 1.7ghz
512MB DDR RAM
4x DVD burner
80GB 5400RPM HDD
Prices in canadian dollars:
M60 price: 4759$
8600 price: 3408$
As you can see, the only major difference between these two machines, other than the chassis, is the Quadro. Is that worth 1351$ canadian to you? That's your decision.