Look into the Ziess V6 and V4 scopes in the Conquest line. I have used a lot of different scopes including Nightforce, Huskemaw, Leupold, Swarovski, Vortex and most of the more popular brands in the mid range. My old Ziess Conquest 4.5-14x40 is about as clear and easy to use and throw up to my shoulder and have a clear sight picture as any I have ever used. They are awesome scopes and really light weight. The price point on them are pretty reasonable too. When considering that you want to shoot long range and keep it light, I think it would be a great option for you. I believe the 6-24x50 is only 28 oz. and has 100 moa of internal adjustment. All for around $1,400.00
When considering mounts I would run the Talley lightweight integral mounts. I have several of them on my guns and can run a Low with a 50mm objective on a scope with a 30mm tube. That is on guns with a heavy varmint barrel.
I think for weight and performance on a gun like that the Ziess mounted in a set of Talley's will be about as good as it gets. It will accommodate everything you are looking for weight and performance wise, and within a really reasonable budget.