I'll second the recommendation for Infrogneato! I got a couple of little frogs and a nice planted tank from Lee a while back. We love our little dart frogs!!
We just got a planted viv and two Black and Blue Auratus this past weekend from Under the Canopy. We've known them for about a year and half and they are always offering deals and making sure you have everything you need. They are great people who really know their stuff!
I checked out both those sites. Great selection of dart frogs. I did not see any planted viv for sale. Maybe when you email them you have to ask them about that.