Hi Hawk,
First off (on Mike Starkey's behalf), welcome to the good ship VAF.
I started wanting to build a Titan T-51...still do. However, I want my bride to fly with me, and she does NOT want to fly in the back seat of anything. She wants to sit beside me.
I then looked at the RV-7 and the Mustang II. I actually like the looks of the Mustang II more, particularly the wing's shape. Performance is close. However, I reasoned that I should pick an aircraft kit whose chances of successful completion are highest. Like all Van's kits, the RV-7 construction is well proven and, in my case, achievable. In addition, RV's have huge amounts of support. Therefore, I selected the RV.
The more I build, the more I've come to truly love this design, particularly with the options I selected (tipper, tricycle, etc). I believe when we finally get "Kelli Girl" airborne on our future XC flights, we'll find that traveling in the RV is more comfortable than the Mustang II.
On a side note, I thought briefly about a Glassair. Fiberglass kicks my butt, so I took less time thinking about it than it took to type this paragraph.
Hope that helps.