x2 on the 60csx. I use that one, and stuck a 1GB memory card in it. I've got both the Garmin city select software for on-road navigation, and the NM and Colorado TOPO maps from National Geographic.
I am very pleased with the ease of use and features on the 60csx. The on-road nav flat out rocks when you're in a strange city- you can tell it to take you to the nearest gas station, or even the nearest specific brand gas station (Chevron, Shell, etc.). It lists restaurants, hotels, whatever you want, as current as the software you have. If you wanna check mine out before you buy one, lemmie know...
Ryan