PSU - go with the Silverstone 1000w PSU
that aliasaid linked to.
Yes the HAF 932 is a great case. I have one myself and I love it.
Yes a SSD would definitely be worth it. but you will still need a HDD for storing your files and such. Western Digital Caviar Black 500gb should do you fine unless you think you would need more storage than that.
Optical Drive - I don't know how often you directly copy cds/dvds but if you plan on doing a lot of that, then 2 drives may be a good option for you. Personally I'm happy with one, you can still copy them, but you would have to open the drive to switch disks halfway through.
The corsair dominator ram will not perform any better for you than the Gskil 6GB(3x2GB) Ripjaw DDR3 1600 8-8-8-24
that i linked to earlier. The only way you would notice any difference is if you were trying an extensive overclock on the ram... and even then the difference probably would only be noticeable in benchmarks, not a gaming environment.
H20 setup - What do you mean that you want this for room to upgrade? Will you be placing this computer IN a desk or beneath one? If just placed under a desk, then the HAF 932 will create enough airflow for you. This case moves a LOT of air. And if you are concerned about airflow, you could easily add another 120mm exhaust fan next to the 230mm on the top of the case, and you could add another 120mm intake fan on the bottom of the case right next to the PSU mount. Looks... well yea you got me there, Liquid cooled setups do stand out a bit.
Oh yea... just so you know, XFX offers double lifetime warrantys on their graphics cards. Sapphire is a good brand, but when spending that much on a single component, the double lifetime is nice to have in my opinion. but thats totally your call, as i said sapphire is a good brand to go with.