I'd definately choose the SPAD Debonair or BUHOR. These are easier to put together than an ARF, FAR CHEAPER, fly as well, and are more durable. If you do manage to damage one, replacement parts are at the hardware store.

That being said, if you go with a Balsa ARF, you should really consider the trainers from World Models (www.airborne-models.com). My favorite of those planes is the Worldstar Trainer. It has a semi-symetrical airfoil and will allow a pilot to progress beyond a typical trainer. It is a .40 size plane. They also have the Frontier .40 (same thing, flat bottomed airfoil) that is also a great value.

If you are looking for a .25 size trainer, the Frontier .20 is a good choice. If your friends are brave, they can start with the Happy Fly .20. It has a symetrical airfoil and will even make advanced pilots smile.

These are GREAT ARFs. Low cost, High Quality. However, I'd still go with the SPADs! 1/10th the cost for the airframe.