I also have a Holux but mine is a
Holux GPSlim 236 and a
QSTARZ BT-Q816 both were both from
www.buygpsnow.com, and they both work about the same but the QSTARZ BT-Q816 takes a lot longer the acquire a signal at cold start. I would recommend a Holux unit, and
www.buygpsnow.com seems to have the best price and I have had no problems with them. I also use TomTom6 and its ok but doesn't have enough POIs for me so I use Googlemaps and Livesearch
Here is the link for discount codes for buygpsnow
AXgps for 10% off gps hardware
AX10 for 10% off software
AX5 for 5% off gps bundles
And you dont have to be a Aximsite member