I agree with da Rock - learning to adjust and operate a 2-stroke is easier than a 4-stroke. As a beginner you'll have your hands full and plenty of confusion added by nerves to worry about the additional effort of making sure your 4-stroke is set up properly. Also with the difference in fuel burn between a 2-stroke and 4-stroke, it'll take a lot of fuel to make up the initial purchase cost.

I recommend going with the 2-stroke also.

Hogflyer