PLX chip: Yes you should be fine.
All SSDs are 2.5" drives. A lot of cases nowadays have holes for 2.5" drives on their HDD trays. If your case doesn't have the holes, buy the Samsung 830 desktop kit. I believe it comes with a converter. Also, you can honestly just set your ssd in your case with no screws because there are no moving parts that could get damaged. I wouldn't recommend this for long term, but you'll be fine if it's only for a week while you're waiting for a 2.5 to 3.5 adapter or something.
Ivy bridge has gotten DDR3 RAM up to about 3200mhz in the hands of some extreme overclockers. For just gaming, 8GB of 1600mhz @ 8-8-8 or 9-9-9 timings will be plenty, although check out these samsung sticks if you feel comfortable overclocking ram:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147096
They can be overclocked like crazy.
Push/pull means you have liquid cooling, with fans pushing air into one side of the radiator, as well as fans pulling air out the other side. So:
air -> fan -> radiator -> fan -> air
Maybe a few degrees cooler at the most.