Looks like you have money to invest into your Pro...if that is the case (you ARE considering the ACD30), grab yourself some more RAM while shopping at OWC. Their prices are terrific and the shipping almost instantaneous. I went through the same process as you last week.
I bought the 3.0ghz with the stock 2gig RAM and an upgrade HD to 1TB. From OWC, I bought 2 more 1TB drives (they are only about 250!) and 8 more gigs of RAM (4x2g sticks). It is insanely easy to put the drives and RAM into your machine within minutes. There are step by step instructions in the manual...really, it is incredibly easy.
From what I have read, it is good to have at least a gig of RAM per core and with 8 cores inside the Pros, that means 8gigs. I don't think it is mandatory by any means, but it should be a goal 🙂
I am only bringing up these points because you have the money to spare with the monitor(s). Speaking of which, as nice as the 30 is, two 23's would be VERY cool too...tough choice. I bought the single 23"ACD and Love it!
Good Luck!
Jeremy