Rakedog - not that this really helps you (yet), but my 07 Ram 3500 Megacab had the B&W turnover ball already installed by a previous owner, so I just ordered the B&W Companion Slider.
Still working on getting it "installed" - I have a plastic bedliner so I have to cut notches out of that first (so the slider sits on the bed, not the liner) before I can actually drop the hitch in. Will post pictures on the forum once I get that done.
I debated about getting a SuperGlide, but opted not to for the following reasons (which may or may not apply to you):
* Camping World tech said they'd have to remove the B&W to install a fifth wheel hitch
* Pullrite makes a B&W adapter, but it's $500+ and requires 2 additional bed holes to be drilled & additional brackets mounted to the frame
* SuperGlide also requires a special plate for the kingpin - extra cost, extra hassle
* Total cost was going to be $1700+ (parts) + labor (??) + hassle to get it installed.
* B&W Companion Slider was $1300 (Amazon!), and (in theory) I can drop it in myself.
* Everything I've read about the B&W Companion (non-slider) suggests people love it
* I'm hoping that I won't
need to use the slider a lot - our 5er has an extended pin box. But I didn't feel comfortable not getting one.
So that's why I opted for the manual slider.
Beulah: '04 HitchHiker Discover America 31.5 LKTG
Beast: '07 Dodge Ram 3500 Megacab SRW w/ 5.9 Cummins