I'm definitely not up to date on the latest and greatest hardware. But it looks like a fine machine to me that should last a good while. I agree with buying an SSD for your OS, but I'm curious if you've ever run a RAID-5 setup using a mobo's onboard RAID controller before. I've read that RAID-5 performance using many mobo's onboard RAID doesn't turn out that great.
I myself am going to bite the bullet in the next year and finally build myself a new kickass rig or buy a laptop. I think I would have already bought a MacBook Pro if the price tag wasn't so big. I'm so damn cheap sometimes, I probably won't build my new computer or buy a new laptop until this 5 year old laptop with 512mb RAM dies on me and I'm without a working computer. My 7 year old desktop's motherboard fries any videocard I put in it and the box has been sitting in my office collecting dust for almost a year. I've just been too lazy and cheap to take a risk on trying to find a replacement mobo compatible with my old P4 2.8GHz 800FSB.