In my previous post, I'd missed that these are FSDs and was concentrating on the springs. The general consensus appears to be that FSDs will lift mildly (+5-10mm, see "humps" posts on a2oc.net), so the difference in ride height at the front in the end should be minimal, and yet still be enough to avoid a Moose.
I can't give authoritative answers (you've read the FSD threads here and on a2oc.net, no?) but if you're going to Weitec and don't want to lose clearance, 'don't get them compressed' is certainly my gut feeling.
Are there any other changes you've made? Hifi, for example?
Bret