You could get a higher capacity SSD of a better model. For example, a 256GB Samsung 830. I'd also choose a WEstern Digital hard drive over a Seagate hard drive, at least with consumer drivers. I keep hearing that Seagate has gone down in reliability lately lately, supposedly related to them taking over Maxtor. A new Western Digital Caviar Blue or Black might be better.
Also, do you have a link to the memory that you're buying? I'd like to get a good look at it. 2GB memory module might be only one-sided and that means slightly inferior interleaving performance. It's not a big deal at all, but I though that you might care if you're going for a computer that is this high end. Also, as another recommended, I'd get a good after-market cooler and overclock the CPU.