I generally don't enter in to these servo brand/model strings as they often end up, well, with many opinions and no definitive results. So I'll say simply I wouldn't be scared to try your servos in a sport plane I didn't have a fortune tied up in. If their centering isn't the absolute best available, so what? Most flyers I fly with will never notice or be able to detect that fact.
IMHO, many guys spend a LOT of money on servos that will perform at a level so far beyond their capabilities it seems a waste. There are many very inexpensive servos out there with good reputations. Here's 2 of them I've been flying for quite a while and would trust in anything short of a full on contest plane.
http://www.troybuiltmodels.com/items/HD-1501MG.html
http://www.hobbyking.com/hobbyking/s...arehouse_.html