CPU is solid, good mobo choice, RAM should do well, pretty nice timings on it, RAID 0 is good, I love the Antec 1200 case, the Antec Earthwatts 750W is a solid PSU, got good reviews, V8 is about the best price vs. performance cooler out there, its about the best you can get without spending $100+.
Why Professional version of Win7? I don't see any viable reasoning to pay for Pro/Ultimate over Home Premium 64b.
they love to put this monitor on sale for $200 like every other week on newegg.com, keep an eye on it it might go down on .ca too, its a great price for a 25" monitor. If not, that monitor you choose is good.
Overall all great choices, I don't see anywhere you could get better deals or any erroneous choices. Nice build.