LT-40
I soloed on an LT-40 with a TT46 Pro.
IMO- its the only trainer to use. It's big and easy to see. It flies very stable. It slows down for landings.
One suggestion though- get an ARF.
Don't waste your time building a kit for your first plane. Your going to crash it anyway.
Get the ARf and slap it together in a weekend. Then go out and start training right away. And when you do crash it--trust me, you will---you won't be near as upset, because its just an ARF.
It will take a month or more to build a kit. You'll have to buy all kinds of tools, which increases the initial cost of the hobby. You'll most likely make a mistake-- I did on my first kit. You'll have so much time and energy into the kit; that when you crash it; it's gonna suck.
The ARF, on the other hand, will only take you about 15-20 hours to assemble. You won't have all the "blood, sweat, and tears" into the ARF.
Get the ARf and go flying. Buy a kit and start building it as your training. That way, when you smack the ARF, you got something to fly.
I got an ARF LT-40 and started training. Then, I bought a Sig Kadet Senior Kit. I started building the kit right away. I smacked my ARF LT-40 on my 8th flight. I went right out and bought another ARF LT-40 and put it together over a weekend. I never missed a lesson.
After I soloed, I flew my LT-40 for about 6 months. Then I started flying my Kadet Senior. I've never regretted my decisions.
Good luck