^ Which "other GPS units" have you been using with SIRF? Just curious.
I have had a 60CS series since they first came out. Not SIRF, but its performance is already incredible compared to my previous generation GPS. So the improvement will have to be quite something to get me to upgrade *just for that*.
I think I'll wait until Garmin includes support for the Galileo system. Some other manufacturers are already. Garmin has been a bit slow in many areas lately, too slow to rebuy a model just for one improvement that already should have been in their models a few years ago, like SD cards.