Am a neocacher (2 weeks old) and I got my Platinum 2 weeks ago for my birthday. Did a lot of reading in these forums to zero in on one and liked the SD card feature of the Gold and Platinums. Checked them out in person to gauge look & feel and leaned towards the Meridians over the Explorists for the larger screens/buttons, words vs pics on the buttons, AA batteries and cost.
I assume it is the same at all of their stores nationwide but my local West Marine is dropping Magellans and doing only Garmins... as a result, I was able to swing my Platinum for $145. They were also selling off Sportrak Pros for $130. Unfortunately, they have not discounted the mapping software---yet!
In the 2 weeks we've had it, we've been very pleased. It has taken us to about 2 feet or so of the caches and gets good signals even under tree cover on the trails. We've hit 6 so far. Picked up the car adapter and case fairly cheap at the Kittery Trading Post and the little ones like watching it track us on the GPS while we drive.
If you can get it at West Marine near you for around the price I did, I don't think you will be disappointed.