Im thinking of getting this airplane and im wondering what engine i should use. im new to gasoline, and ill be flying 3D. any feedback would be greatly appreciated!

DA35 if you want great power, reliability and customer service. However it will cost you more.

DA 35 will have enough for hovering and vertical with this plane?

Definitely.

alright thanks a lot! the JTec pitts muffler is the only muffler i can find for it, is this the only one available?

OS GT33 is the best of the bunch in this size. I've tried most of them and the 33 has power and torque to turn the bigger lumber. I'm using 20x12 on mine, but a 20x10 works great too. Or a 19x10 3 blade