Tower categorizes their planes by size. If you go here: http://www.towerhobbies.com/listings/cat-cat-a.html you can see a list of all the plane categories they carry. This list is divided into kits, ARFs, etc. Look at the kit list and click on the links that include your engine size. Then do the same in the ARF category. For example, the Sig LT-25 that was mentioned earlier should be in the R/C Airplane Kits - Trainers .20-.50.

Once you are in one of these lists, you may have to look at the details for a plane to determine if it's appropriate for your engine. In general, it's good to choose something where your engine is near the top of the acceptable range. However, the Sig LT-25 for example lists .25-.32, and most any engine in that range would be ok since it's a trainer with a larg wing area.

Edit: I've found that Tower has a limted number of planes in the .25 range. If you're looking for a trainer, here's a possibility from World Models: http://www.airborne-models.com/html/...p?ProductID=37 .

If you want something that could possibly be a second, and definitely a good third plane for that engine, look at the World Models Aircombat planes (at the airborne site under "Warbird". I have one of these and while it's not the prettiest plane, and definitely not scale, it's so fun to fly I take it to the field more than any other plane. I've flown mine with an old OS .25 FSR, which should have about the same performance as your .25 LA. It did fine. I like this plane so much I have a second one stashed away just in case I crash it.

And one more from World Models, that would be a candidate as a third plane is their 1/8 scale Piper Cub. This was highly recommended by someone else here on RCU as being a great small Cub. However, even though it's got a high wing, it's not a good trainer.

There are a bunch more candidates out there, these are just a few of the ones I know.