Joe,
There are a couple of resin aircraft manufacturers out there that make some great kits! One is Planet Models http://www.luft46.com/Planet/catalog.html
and the other is Anigrand: http://www.anigrand.com/index.htm
I think these would be pretty good starts. I did my very first all-resin kit which I purchased from Anigrand. It was their XP-67 Moonbat in 1/72 scale. I wouldn't exactly call that one in particular a "shake-n-bake" kit but I don't know if you'll find a resin kit that is. I'm not saying they're hard! It's just that they need different kind of attention. My XP-67 went together beautifully but it was my first experience with filling in the microscopic air bubbles on the surface of the fuselage and wings. It was nothing that some Mr. Surfacer 500 couldn't take care of.
Those web sites have some great and, best of all, different and interesting aircraft. That's what I needed to get me out of my modeling doldrums. The prices range from some in the teens up to $50+. So I think they pretty much span all subjects and price ranges. Oh! Perhaps best of all, some kits only have a dozen and a half parts in them. I think that's great for someone like me (and perhaps you?) who just wants to take their first forray into resin kits. That way you get to focus on the experience and not have to deal with kits that have 175 pieces.
Best wishes,
Eric