Dan,here is my .02,even though I'm an asshat apparently. I have an 09 Jeep with a fair amount done. I love it and wouldn't trade it for much,but if i were you,keep your truck. Pay it off and get the Jeep,of get another payment now,but don't get rid of the Ram.
I love the Viper trucks,have driven a modded one and It's a totally different animal.
More involved,like a sports car I guess with the 6 speed and Rwd. The Jeep is everything the RAM is not. The RAM is everything the Jeep is not.
To settle this there is only one option,have both. I'm pretty sure you would he sore without your truck,just as I would be sore without my Jeep. Both are beasts in their own right. Hopefully you can figure a way to enjoy both.
Also,if you go with a Jeep,09's are the best year Lol,J/k but seriously the 08-10 were a lot nicer in the inside and offered a bunch of improvements over the 06-07. But in any case you won't regret owning one. I have 24k trouble free miles on mine. Go for it!