i have Houlx GPSlim240 with OCN6, they work great on my Mougl. I bought them from Buygpsnow. The followings are the links including the discount: (sorry don't know how to do hyperlink on this form). OCN6 does turn by turn, but they don't say the streets' name; they also reroute for you.
Discount:
http://www.buygpsnow.com/aximsite_di...or_members.asp
GPS Bundles :
http://www.buygpsnow.com/oncourse-bundles_63.aspx
I actually bought the bundle from them, but through amazon.com since tax wasn't included, it turned out to be cheaper than if you were buying the bundle with the bundle discount.
Amazon link:
http://www.amazon.com/Holux-240-Blue...3406980&sr=8-1