I agree with Bruce on the 125. My buddy had a stick with the Saito1.00 and it was awesome. It will easily handle the 1.25 and you will be thoroughly amazed at what this plane can do with a 1.25. Just keep your on it when going vertical as it will get small very quick

I will edit and post a vid of his with the 1.00 later tonight and let you decide.
Shane