Try most any of Sig's trainers as a first kit. The Kadet MkII was my first plane and first build. It has a 56 inch wingspan, slab fuselage sides, a nice plastic cowl, aluminum main gear and ailerons, and flies great on a .40-.46 engine, and the servos are fine. You'll only need 4 of the servos. I'd recommend taking out about 2/3 of the designed dihedral, makes it a sportier flying plane. If you want something a little bigger (78 inch wing), the Kadet Senior is also great. A little more stick-building involved, and the kit has no ailerons, designed for three channel, but they are not difficult to design into the wing as you build it. The Senior ARF has barn door ailerons instead of strip ailerons, I'd build in the barn door version, plus reduce the dihedral in the kit wing by 2/3.

The Senior is a great all-around plane, the .46 will fly it fine, but if you want to upgrade it later with a bigger engine, it makes a great towplane or candy bomber (there's room to add a bomb bay). Both kits sell for less than $80 USD.