Is it the kit or the ARF? I have had both and they are excellent flyers. The kit had a 3W70B2 in it and it flew great. I had the ARF version with a Zenoah GT-80 and then replaced it with a 445. The GT-80 was the best in that airframe. it fit inside the cowl and had plenty for that plane. The 3W70 was good in the kit plane although it was heavier. I dumb thumbed it into a cartwheel on take off. (reversed ailerons)
I must say that the Laser 200 is one of my favorite planes and I now fly 35% Aeroworks Extras and YAKs. the Laser is hard to beat. Just don't forget the strut wires on the stabs.

Good luck with whatever you decide to use. I'm sure it will be good.

I would like to see Lanier or whoever owns it now, come out with the Giant Laser again.
(hint) are you listening?