good gps in the sun?

HI guys, been using a garmin Oregon 550t, however I would like to find something larger and easier to see in the sun.  I've been holding the garmin in my hand but would like to get a gps unit(not ff/gps) that I can mount and see at a distance.  Any suggestions would be great.
Thanks

Gamin's new model is the Montana.  It has a larger screen that claims to be easy to read in bright sunny conditions.  This is next on my purchase list.

http://sites.garmin.com/montana/

Thanks Matt, will def. consider it.
however they claim that the oregon 550t is sunlight readable.

Ken, I have found the key to better viewing is to have the gps mounted close enough to swivel the screen to the optimum angle as your kayak moves & turns in & out of the sun's glare. For this reason I have both my combo Elite4 FF/gps & my handheld 60csx mounted on the small ram balls directly forward of the rudder up/down pullcords on the rails of my Hobie. If you mount the gps too far away & you can't angle it to avoid the glare of the sun the size & brightness of the screen may not help. Having the gps close also helps for quick marking of waypoints too. jim

Thsnks jim great  advice. Iam going to mount just in the netted pocket  of my hobbie.
Ken