Seagate,The MarinerEye view that you can ass with the g2 card is a really cool feature, especially when coming into passes and river mouths. If you haven't seen it, check it out...
If I was going to spend the $$ to buy a larger screen I'd go for the Lowrance HDS-5. The resolution on that thing is (SLICK) and it is easier to find you way around in the software than the Garmin. Plus the sonar capabilities far exceed anything Garmin has out right now.
CB- Wanna sell me your GPS? I need one ...