Wanted to chime in here. I've still got my Senior Kadet that I purchased used when I started flying. The builder installed ailerons and my personal opinion is that you SHOULD have them on your trainer. I'd throw in my vote for the Senior and if you buy the ARF, it has ailerons already, the kit doesn't but you can build them in easy enough. My dad (the builder of the family) put together another wing for the Senior that doesn't have nearly the dihedral as the first one and it really opened up the plane to do more advanced stuff. Anyone that tells you that you'll outgrow your trainer and never use it again is definitely mistaken or really missing out on a lot. I've got aerobats and warbirds but the Senior with that flat wing is my everyday flier. You can't go wrong with the Senior.

(Now I'll get on my soapbox) Just because the booklet says you CAN fly a Senior with a 46 engine, doesn't mean you SHOULD fly it with one. I had a 50 Saito in mine and it would make it off the ground but there was so much more I was leaving on the table. Personal opinion (and flame suit on) but the Senior with a 65 2-cycle or a 72 4-cycle is the perfect combination for the beginner or the experienced flyer. It'll teach you throttle control for altitude and it just sounds better when the engine isn't working at full throttle just to keep it going. I've got a 91 in mine and LOVE IT! Maybe that's not for everyone but don't sell yourself short either. There's plenty of plane there for a little larger engine.

You won't regret the Senior!