$1000 Game build, first time

Okay so I need a little help getting a good build and doing it at a decent enough cost. This seems like the place to get good advice.

So all of my stuff needs to be Canada-shipping friendly, so I've been sticking to newegg.ca and memory express. I'd really prefer memory express in case of returns, in-store seems much simpler than online, but newegg seems to be cheaper in some cases.

I'm looking to buy everything sometime next month, and priorities go in order of: Gaming (SC2, FF XIV), school (lots of windows open simultaneously, loads quick), and typical music/web/chat time wasting. Not planning to overclock, unless it could be a really big discount, I'd rather have the longevity and less stress. And lastly, a nice quiet system would be great, but something I am willing to sacrifice for a lower cost.

Anyways, here is where I am so far. (These first few I'm pretty confident in, I'll probably go cheaper with the i5 processor and just hope I'm lucky with the HD)

OS - Win7

Processor - Intel i5-750
(whats the difference between 750 and 750S?)
The real question here is upgrading $100 more to the i7, the 930
http://www.newegg.ca/Product/Product.aspx?Item=N82E16819115225
or the 860
http://www.newegg.ca/Product/Product.aspx?Item=N82E16819115214
because I plan to play FF XIV, and what the recommended setup seems to say is that it will support the hyper-threading of the i7.

Video Card - Nvidia GTX 460 1G non-SLI
After reading the review on here, this ones a no-brainer, but I do want room for a possible SLI later

Hard Drive - just looking for a dependable 1TB drive, probably 7200 RPM
http://www.memoryexpress.com/Products/PID-MX24082%28ME%29.aspx
Question here is just looking for a good deal, and a dependable manufacturer (from reviews seems like 1 out of every 5 people just go through hell with DOA drives)

Case - something that fits an ATX board and 1 CD/DVD drive, at least 2 HD and is cheap

Monitor - large screen 24"(ish) not sure about resolution, I'm open to suggestion, not really worried about image quality for games, more just large screen for productivity

HERE IS WHERE I"M WORRIED

Motherboards confuse me but heres what I think I've figured out
P55 (probably an 1156 socket, depending) 3xPCIe slots ATX
I have no idea which board/manufacturer is really going to be better or worse, or little details I'll be missing, like ram speed, which brings me to

RAM - DDR3, but no clue which speed would make a difference, should I aim to save $ or sacrifice for quality?
As well, is 4G (2x2) enough?

Powersupply - Planning for i5, SLI GTX 460s, and 2 HDs, how much is enough? should I save now and just settle for one that could handle non-SLI?
**from rereading this myself, I need to save money more, so I'm probably going the route of the i5, non-SLI, and less expensive ram/MotherB, and won't be upgrading for a long time, in the measure of a year, or 3. So judge by that.

And just fyi, I plan to use the third slot PCI for a wifi card, I know its ridiculous but where I'm living getting a cord in here would be complicated.

So really the last thing to keep in mind is I'm aiming to keep this build under $1000, realistically I'm going to been cutting it close even with the i5. So any help is appreciated!

Thanks