The MDS engines are junk, avoid them at all costs!

I would get an OS Max 46AX. It about $150 from Tower Hobbies and you can usually get a coupon to save you another $15 or so. I fly the same size plane with this engine and it's plenty of power. You don't need a 0.60 in this trainer, as it will be way over powered. The OS is easy to break in and once that is done, you won't have to touch the needle valve ever. It takes about a tank of fuel to break in and then just run it all little rich for a while and you're good to go. They are also extremely reliable power-plants. I have yet to have a dead stick landing with the 46AX and that is well worth the extra cost especially while training.