Tis true!, most kits seem to lumber you with a crappy pump and small tubing to start, then a poor radiator and fans
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Having said this I'd say Inovatech look good to me, but I'd never buy a kit all in one...
what I'd recomend is: block of your choice, Clearflex 1/2inch tubing, heatercore (Dtech is good sized for fitting inside case easily), any 120mmx38mm fans (YSTech are pokey), the pump is a hard one though, I'd definatly go with one that has an 'off~centred' outlet, Iwaki20RZT, Little Giant, ect, use a Ehiem1250 or Via1300 to start with if you're stumped, Via if you plan to upgrade to a high pressure/head pump soon cause they're cheap...
PS, saying that I don't really beleive a 1250 has anything over a 1048 in performance, nothing that'd warrant paying extra for, the head increase is too small, so it depends on whether you want extreme performance or a good quiet system, performance=Iwaki ect, good&quiet=1048+...