Pump: go with what your money can get.
For your setup (CPU & GPU only) a 600lph like the E1048 is quite enough. Do not forget that with pumps, quality = price...
Blocks: you're in the US so candidates are DangerDen, Swiftech, Dtek and so on. To save on shipping order everything from the same. For example get a Maze3 w/ metal top + GPU block + some tygon from DDen (oh and some hose clamps).
As for performance,there's no difference between different 'high quality' blocks. Get the one that seems more convenient for U.
Tygon: yes it's better if you've got tight turns (and since you've got 2 blocks you'll HAVE tight turns). Routing is made easy because it doesn't kink, pinch or flatten. No elbow needed. As a bonus it looks real good. Get 1/2".
Airtrap: make one. It will cost you less than $5. Get waterproof sealing epoxy, a PVC tube (40mmx50mm for example), end caps (with vise and o-rings), and two fittings.
Apart from trapping bubbles - which is neat already - it can serve as a fill point if placed at top. In this case place a "purge valve" at bottom and filling / bleeding your circuit will be a pleasure.
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