[Cube] nVidia 5200/5500 anyone?

[Hal]

Is anyone running an nVidia Geforce 5200 or 5500 in their Cube? I  
realize that doing so generally requires flashing the ROM on a PC  
version, but I've been considering this for some time. I'm currently  
running a Radeon 7500 and would like a bump in performance. I'd like  
to do so with as little collateral impact as possible (i.e. VRM move,  
case swap, etc.). I also run an Apple 20" Cinema Display with ADC,  
though I should be able to get a DVI-ADC adapter to sort that out.

I'd be curious to know what card you're using, how hard it was to get  
up and running, what monitor you use, and general impressions.

Any info is appreciated.

-Hal