The biggest questions you have to answer are 1) what material do you want to use, and 2) what the max size of your part? Personally, I like ABS. It is flexible and more forgiving and assembles easily with acetone. My favorite lowend 3D printer is the Makerbot 2X, however you won't get an iron man costume out if it with the 6x9x12 build volume. However, with a few mods you can print, ABS, Ninjaflex, and even PLA.
The Ultimaker 2 is a great printer for PLA, nice resolution, however it uses 3mm filament which is not as common as at the 1.7mm that most of the other printers use.
My lease favorite low end 3D printer is the Makerbot Z18.
It's all good fun, go for it!