Have you sat in a WK? You might be disappointed. I found it very low inside and I'm only ~6' tall with long legs. Before getting too excited about the WK go test drive one.
I just picked up an 09 WK. I'm also 6'4". I agree the WK is a tight fit, but I have found "my position" which suits me just fine.
I have a little over 1" between the top of my head and the roof, and this is with the sunroof option. Although I end up sitting higher than I would like, the rearview mirror can be worked up to see clearly ahead.
I would like to see if I could get the rear seat bottom to tilt down a little farther while leaving the seat front all the way up for support. I have heard the seat base can be modified for height, but have not seen any particulars on such a mod. I have also thought about checking out the SRT8 seats. If they offer a greater range of adjustment, I'd keep an eye out for some seats from a wreck.
My WK still has a stock suspension, so I do have to duck down a bit ti get in. I may end up with a 3.5" lift just to make getting in/out a little easier. A 2" BB might be enough, but I think I'd rather get a complete lift.
There is plenty of leg room for me, and someone who rides behind me, so long as they are not as big as me.
Another words the kids fit back there just fine, with as much room as they had sitting behind me in the Ram 2500.
I find it a little tight for the left arm, as the ergonomics appear to be for someone sitting a bit closer to the wheel, but I manage. Regarding the left arm, the only thing that really bugs me is the door lock post. There is no room for my left arm to fit between the post and the door window frame. I have thought about cutting it down and installing a pull cord, but wondered about the poor safety implications of the mod.
Overall, I like the WK and I'm looking forward to working on it in the years ahead. Now I just need to find a trailer to take the place of the 4x6 pickup bed I sold.
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BTW... This is my 1st post and I have been enjoying the read thru of many sections on the site.
Here's my ride:
09 WK Limited
4.7V8
QD II
18" JK Sahara Gladiator Wheels
265/60R18 Wrangler Silent Armors