Looks like Garmin just released a new line of hand held GPS devices called the Colorado.

Looks like they have color screens with 3-D capability plus all the bells and whistles.

Pretty pricey with the lower model starting at $400 and the top of the line hitting $600+

I would suggest waiting a few months until they work out the bugs and version 2 or 3 is released. Plus the price may drop by then as well.

Here is the link if you want to check them out.
http://buy.garmin.com/shop/category/mappinghandhelds?locale=en_US