Hi everyone, I currently own a Mac Pro 2008 (4Gb, 2x2.8Ghz quad) with a 8800GT. Now I want to buy the 27" ACD when it comes out but I can't connect it to my 8800GT because it doesn't have a mini display port. The solution for this is to buy a Dr Bott converter (DVI signal converted to mini display port) (also see Dr Bott 9598-DGVL/ which will set me back $150 (for 24" there's this one: 9590-DVLK). Now I can also buy the ATI Radeon HD 4870 (which has mini display port) for about $300 (I'm from Europe so both prices are in Euros actually). This way I will also have the speaker and isight functionality which I may not have when using a converter. Now for my question!! Do you think it is worth upgrading my 8800GT to the HD 4870 (for 185 euros)? I'm using my Mac for photography (CS5 / Lightroom / Capture NX etc). And do I have to remove my 8800GT once I buy the ATI? Or can the system still use both, even if I only want to connect just one monitor to the 4870? Thx for your thoughts!