If price isn't an issue, there's no question - Go with a 4 stroke.

Some people say 4-strokes require more fussing than a 2-stroke. I can honestly say that I've never seen it.

The 4-stroke will burn much less fuel, make MUCH less mess on your plane, and the sound is worth more than words can say - especially on something like a T-34

I like to use 2-strokes on 40 size planes that require speed, but anything 60 size and over I prefer 4-strokes (For the reasons mentioned)