I love my WK. It's totally different than what a normal WK looks like, it doesn't jump very well and no longer does wheelies cuz I stretched it and added a bunch of alloy. It's now my waterproofed scale-ish trail/mud truck. I had a lot of fun with it when it was stock and some day will get another one and only do a few minor mods.
I want a Clod too. Tho it's a tough decision between building a crazy one with a sweet chassis n stuff, or just buy a kit and leave it stock.
If you're limited on space and would like a truck you could have a little fun with indoors, I'd vote Wheely King.
You can go crazy and spend a lot of money upgrading a WK (I did) but the money spent might be more worthwhile on a Clod, tho you might end up spending a lot more for parts.
I'm not real thrilled on the amount of power needed to run large RC's. Yeah, they're frickin sweet but two motors on one 6 cell pack or 2s Lipo... is gonna suck that battery dry pretty quick. If you run two packs at a time, you'll get more power and/or run time... but again, you're going through your packs pretty quick.
My WK isn't incredibly fast with the different motor/pinion I put in it but I get like 20-30 minutes out of a Radio Shack 6 cell 3300mah pack. I'm gonna play with the gearing to get a little more top end out of it. I'm happy with it for now, it's at least faster than I can walk and will kick up a little dirt.