Not tried the Multicomp (but want one), but the Compulator is a fantastic piece of kit. I really, really want another one (sold mine a while back). I like the Barge Concepts RC1 as well.
Had an Aphex PF and it is good but not that indestructible. For the money I'd get a Boss CS3 and Monte Allums opto plus mod kit, just a transparent but (to my ears) more compression on tap.