I have an 08 jk while a good friend has an 07. Both of us have dual tops and neither of our hard tops leak. Most of the leaks actually come from user error. If you latch it in the wrong order and it doesn't deal right it will leak. If you work back to front and make sure all the deals line up its fine.
As for engines some burn oil. Most don't. If they do its usually 1/2 qt per oil change so its nothing huge. It is due to the rings however its not a sign of them wearing out. They won't wear out any quicker than a normal engine
I like my jk for highway use as well as off road. I looked at a LJ rubicon and liked it but I found my jk newer and cheaper with 10% of the miles so I couldn't pass it up. The trunk space on a TJ vs jk is quite different too if you carry a lot of stuff
"You didn't buy it to look at it!"
2000 TJ Solar yellow, 3.73, 178k, limited slip D44
2012 GMC sierra crew cab--Daily Driver
2008 jk X 6spd Red Rock---Sold and missed