RVs are awesome planes and I had the order form filled out for an RV-7. However, after talking with quite a few builders I decided to hold off, maybe down the road. Orbit gave a pretty good description above about the various RVs. I'll add that I really wanted the RV-9 but after lots of research figured you're much better off with the RV-7. They're pretty close to the same plane, but the 7 is aerobatic. This is huge for resale value!
If you like the Kitfox, you have got to check out this guys videos. His day job deals with filming/expensive cameras, plus he lives near a bunch of BLM land, which means he can land anywhere can make awesome videos. Also, check out the Rans S-7 or S-20 if you're interested in an alternative to the Kitfox. I've flown with a few Captains recently that have built the S-7 and they love them. I've flown both, they are a blast to fly and they're essentially the same plane, but the 7 is tandem and the 20 is side-by-side.
I ended up going with the Rans S-21 and my wing kit is showing up to my garage in a few hours. I don't really care to fly aerobatics in an aircraft that doesn't have an ejection seat, and would rather bounce around the local dirt strips, with the occasional weekend trip. It's relatively new, but much of his stuff is being reused from other kits he has designed. It's STOL-like but will cruise around 155mph @ 75% with a 180hp motor. For me the build time/complexity was a huge factor, and that's another place this plane excels. Given that it's all aluminum (CNC milled parts...read very little drilling/deburring) and built mostly with blind rivets, they're forecasting 500 hours, not including paint. Based on a few bloggers that have already started their wings, that seems fairly accurate. On top of that, there are very few times where you need another person there to help you, which is key since I live by myself and don't want to have to always bribe my buddies to buck rivets for me.
Here is one that is already built. It's hard to tell in the pic, but the doors and roof are all lexan...great for visibility. Cargo space is pretty awesome and is easy to access due to the large door and seat that fold down quite a bit.