It sounds as though you are considering two solid PCCs. Stellar Challenge has been dominated in the last 3-4 years by JP. I had a decision to make a couple years ago and I purchased what I believe is the best, a JP. I would go with an ultra light weight. You may be able to get a slightly lighter gun, not by much, but the reliability of the JP is first class.
If you change your mind
Discount Code for 5% off a gun and 10% off accessories: 56SS0916