sorry to bump an old ass thread, but I recently got the Selectech's and wanted to comment on them.
they are expensive, way too expensive, I don't think anyone would argue that.
I love them, the concept of adjusting the weight on the fly is remarkable, my old set was okay, but I constantly had to readjust the clamps as they'd get loose on their own and make the plates clank which annoyed the hell out of me. Switching weight on them? don't get me started, it took half my energy to do
the Bowflex method is perfect, I can swap from 20 lb's to 25 in less then 10 seconds. 52.5lb's is the max, which I've noticed some people on here saying "isn't a lot" maybe I'm a girly-man, but that is more then I'll need, for a good awhile anywho. I'm working out, not trying to become Mr Olympia but to each his own.

They are also comfortable, a lot of sets just plain hurt my hands after awhile. my other favorite thing, they are silent. my old weights would clack and clank and really get on my nerves, maybe a small issue but silence is golden when I work out.
I got them as a gift, would I pay $400 for them (extra if you want the stand) I dunno, they should last me a long long time, compaired to the money I spend upgrading my pc every 12 months, these would actually have been pretty cheap. Bowflex should cut the price to around $250, at $250 they'd still be some of the most expensive hand weights on the market.