Compare Garmin 4210 to 3210

[Badsanta]

Well after pricing things out I wonder if I need the new 3d garman .
From what I read the 3210 does tons more than I am used to. I know I can add the $450 per chip extra satellite photos later if I go with the 4210, but I think I may never need it. I can get the 3210 with the weather and a digital depth for the same cost as just the 4210 alone. Any one use the Garman 3210 and what do you think about it. Thanks again