OK, just an update for anyone still interested. 
I will be picking up the two-light RX600 kit (we get the 39" Rotalux square softbox thrown in here in Oz, because they're feeling guilty about ripping us off on the price
). Since most of my on-location outdoor shoots require one light, I will start off with a Tronix Explorer XT and see how that goes. I use the sun as the second light, and I have speedlights if I need additional lights in a pinch. A lot of my other gigs have access to AC power, so monoblocs will be the better deal there.
If that works, I will pick up an RX1200 as well for the outdoor stuff, and end up with a sweet three-light RX outfit (five lights all up including my D-Lites). If not, I will end up with a Ranger eventually...


