This is a little late, but the kit pump does not have a variable speed control. I don't know what your setup is, but my swiftech mvp-655 has a variable speed control that works just fine at settings 1, 2 or 3. It is noiser at setting 5, however I'm sure there are other ways to control speed, and I believe that pump is more reliable than the other laing/swiftec models. Also, you may not find setting 5 to be bothersome.
Tubing is relatively cheap, so I would have gone with tygon, epsecially since you're using 7/16" ID over 1/2" fittings. Tygon would probably be better, but I don't know that for a fact.
As for hose clamps, I would use these:
http://www.silentpcreview.com/forums/vi ... ight=clamp
I tried some of the worm drive clamps, and They're just too easy to over tighten.
Yate loons (sleeve bearings) are ok as long as they are mounted vertically.
Except for a few details, it looks like a good kit. I might have gone with a silent video card so you don't need the gpu cooler, but I don't know your system or intended use. - FG
Oh, you'll also have to find a way to minimize pump vibrations using some kind of suspension or vibration absorbing pad.