This is the Wingmaker 1, it is ideal for what you want to do and the 25 is an ideal engine for it. Its quite lite and slightly smaller than the traditiona 40/46 sized trainer.

In a word with a good 25 they are 'superb' and a wonderful flyer. There is nothing better in a trainer for a twenty five sized airplane. There are are seven or eight running around our field now and I have flown all of them. Most guys start hanging 40/46's on them and thats a mistake. The smart ones have gone back to the 25's. Will fly better than any with a 25FX.

This I would recommend over the low wing sonic any day for you. It not expensive either.

http://thewingsmaker.com/airplane_details.php?name=Wingman%20I%20(GP)

John