2 Dell U2410s & 1 Apple 24" on 08 Mac Pro - wait for 5770 card? Thoughts?

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I'm thinking about getting two of these to flank my 24" LED, using the display port connections. I've read some on MacRumors complaining about calibration issues and such, but some were using VGA/Analog connections. Would using the display port connection make a difference? Is it a good display? It's a CCFL IPS (I'd prefer LED IPS but not many on the market) with a ton of input and output options, and hooked up to my 2008 Mac Pro's ATI Radeon HD 4870 and GT 120 cards a three display system would be perfect.

Thoughts? THANKS!

 

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Ok
I just bought the GT 120 for $130 in addition to the 3 month old ATI 4870 I already have to power the two additional Dell U2410 displays I just ordered (at ~$425 each from Dell for a 24" IPS CCFL LCD with 3 year warranty and tons of connections seems like a no brainer) to flank my one Apple 24" LED. Yet I could wait for the 5770 through Apple and just use that, sell my new 4870 for about $275 and get the 5770 for $220 (discount) and return the unneeded GT 120. I'd get 1GB on one graphics card instead of 1GB between two.

Think I should wait it out for the Apple 5770 or flash a Windows 5770?