When I started my research back in late December the Tero X 6 did not even exist. Didn't exist when I decided on the Vado 5.0. But now I am excited about trying this bicycle out! I do want something that leans to rock/sand/dirt etc.. than street as I already have a street bike that I like. I think I'll head to the store tomorrow.@California
I am just going to chime in with my vote for the Tero X 6 and add the RTL515 radar to it. I have owned a vado, and it is a great bike, but when the going gets rougher/steeper here, it can still be a bit hard at rough high grade hills. Buy new handle bars and stem if you need to. If the price gets you, then the vado is great.
My wife is probably pulling the trigger on a como 5.0 soon. The differences between them come out in the terrain. All should be able to be made to fit you very well.