Q: One G5, Two Graphics cards- which to keep?

I recently grabbed a G5 off of the "pile of computers that is on a pallet that will go to the recycling plant where they throw everyting into a giant chipper".  Feeling sorry for it's bretheren and remembering a scene from Fargo, I grabbed a MDD G4 and a Revision A B&W G3 the next day.  Save the Macs!  The pile of computers I got came with G5 graphics cards in both the G4 and G5. The G4 needed only a hard drive to run; I also replaced the jet-engine fans and added an Airport card.  To use an ADC monitor on the G4 I had to get a G4 specific graphics card. Problem solved, but now I have two G5 cards.  G4 and G5 cards differ in the placement of the ADC power tab on the card and the motherboard.  Here's what I have:

 

Card #1: ATI Radeon 9600 Pro, 128 MB

 

Card #2: ATI Radeon X800 XT, 256 MB

 

Card #1 was obviously the OEM card and card #2 was probably purchased after market as this unit was used for video editing. I currently have an Acer DVI monitor for this unit; I may get a 21" Apple ADC monitor if it is still available.

 

I will not be doing any video editing or gaming with this unit.  I will also be running only one monitor.  It will be used mainly for music playback, probably in iTunes or some other sort of playback program. Some light web browsing and word processing is also a possibility. Playback of video is not important; at most I may play an occasional clip from YouTube or something similar.  eBay tells me I could probably get a good price for the X800 XT card, while the 9600 Pro is in the $10-$20 range. I get the feeling that the X800 XT card will be overkill for what I need, but is selling a really good graphics card crazy even if I don't need it? What can the X800 XT do that the 9600 Pro can't? I'd probably take the $$$ from the X800 XT and buy some more memory- I understand the value of that but graphics cards and their capabilities have always been kind of a mystery to me.

 

P.S. The G5 is an early 2005 G5, 2.7 GHz dual processor and in intact liquid cooling system (knock on wood).

 

Thanks-

 

Val