As for a case for watercooling, you want to look for something that has enough room to either cut a blowhole, or a front of the case 120mm intake. I'd recommend the blowhole, if you don't mind cutting up the case. How much are you willing to spend on the case? The most popular cases overall are Lian-Li, Coolermaster and Antec/Cheiftec/Chenming/etc. A lot of those cases have enough room for the fan mount, I have a Lian-Li PC-65 with a blowhole for the radiator, and it works quite nicely. I've seen a lot of people with Antecs take out the lower HDD rack and put in the fan there.
For the pump, the Ehiem pumps are generally agreed to be the best, but they are also expensive, one is $58 and one is $68. If you want to save a little bit, I've heard the the Hydor pumps are also good, although not as long-lasting and as high quality as the Ehiems.
I haven't heard of the Blue Block CPU waterblock, do you have a link to it? The best all-around performing waterblock is the
White Water waterblock, although it is pricey. If you look around that site (dtekcustoms.com) they have a lot of good blocks. I have the TC-4 Rev. 2, which is a pretty good block.
If you want more information, there is a
water cooling forum. There's also lots of good information in the
cooling stickies. For more information on cases, check out the
cases forum.
And...
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