If you aren't afraid of getting addicted, and/or don't llike the time it takes to build your own, check out the latest 1/72 diecast offerings from the likes of Corgi, Dragon, Hobbymaster, etc. The level of detail is incredible, and they are constantly coming out with new models, paint schemes, etc.
You can check out a forum dedicated to them at:
http://www.modelhanger.comYou find pictures and reviews of the models to help you decide.
I also enjoy builiding - I do a lot of 1/72 to fill in the holes in my diecast collection, but my favorite scale is 1/48. Small enough to fit several on a shelf, but large enough to have fun detailing the cockpit, etc.