If you weren't going to get a Vapor... what other case would you get instead?
Something like the Ivyskin Reception case (current thread in this sub-forum) as I really like the design of the 4 (leaving aside antenna issues).
http://www.ivyskin.com/iphone-4-case/iphone-4-reception-case.html
However, I was not impressed with the general reception to Ivyskin's cases last year on this forum.