Thanks for all the great info people. Based on all of the info provided plus reviews that I have read if I can manage to hit 400MB/s with ATTO then that is about as fast as I am going to see with the onboard marvell controller. In part due to the single pci-e lane of the onboard sata III controller with a max 500MB/s plus the marvell controller itself. So the marvel 9182 controller is supposed to have two dedicated pci-e lanes which apparently makes it run better than the 9128 controller. The asus rampage extreme III black edition has the 9182 controller and it is supposed to work pretty well according to what I have read though it does trail behind the native intel driver but not by much. So what if I had a pci-e raid card that had two dedicated pci-e lanes? I would think this would be a definite improvement on the single lane controller on my board. I think at 180MB/s, I must have the crappiest read speed of any SATAIII SSD out there for any platform.
I think I am going to cross my fingers and give the rocketraid 640 a try. If it sucks then I will just send it back to newegg. It is currently half price down from $180 to $90. There are actually a number of reviews from reputable sites that are all positive. One review from tweaktown( I think that is where I read it) shows single SATA II SSD's hitting 200+MB/s using hdtune and 300+ with a single SATA III drive.
It is supposed to be bootable out of the box and have two controllers each with two dedicated pci-e lanes and work well with a single SSD. I will post my results after I get it. If it sucks you can politley say I told you