The fact that you are "asking the question" actually says a lot....I have been through the same dilemma and here is my opinion:

I was preparing my first 50cc gas airplane which was a Great Planes Christen Eagle II. The large scale servos that I had specked out from JR were pretty expensive and I opted for some Power HD servos from Troy Built Models at a fraction of the cost. Today I am "nervous" when I fly that plane...I have had no troubles with the servos but it's in the back of my mind pretty much all the time...I got extra servos "just in case" but what are the chances of the servos failing on the ground??


Long and short of it is: If I had it to do all over again I would buy JR or Hi-Tec servos just for the piece of mind...

Just my .02...

Chuck