Perfect timing with this thread 
Lodestar seems to get a good wrap, where are people getting them from?
Also how well would they team up with Orions bare bones Guide scope package:
http://www.bintel.com.au/Astrophotog...oductview.aspx
Joe, that's a fast short fl guide scope, so you could happily use a QHY5, QHY5L2, ASI120 etc. no need for the more expensive ones.
FWIW, I used a colour QHY5 for years (about 1/3 mono sensitivity) with an f4 guide scope and it was fine - never any trouble finding a guide star. A lodestar or QHY5L2 would have been a whole lot more sensitive, but that wouldn't have made any difference to guiding - you just need enough sensitivity to find one guidestar and anything beyond that is nugatory.