Do you want MIL or MOA? FFP or SFP? Illumination? Those will all factor into weight:
Best options I am aware of based on weight:
-SWFA Ultralgiht 2.5-10x32 - 9 oz - Has an option for a decent BDC reticle but has bad eye relief and is dim and looses clarity beyond 8x.
-Maven RS.2 - 2-10x38 - 12 oz. - Good clarity & glass, eye relief is a little short so would not recommend for a magnum but fine for smaller cartridge. BDC reticle subtensions are 5 & 10 MOA which is pretty far apart and of limited utility.
-Tricjicon Accupoint 3-9x40 - 13oz - Good glass and Mil Dot reticle but wit MOA turrets. Kenton can make a speed dial for this scope which is a handy option. Has always on fiber optic illumination.
-Trijicon Huron 3-9x40 - 15oz - Good glass and nice reticle with hold overs to get you to 400-500 yards. Know reliable scope that is also budget friendly..
-Trijiccon Credo 3-9x40 - 17 oz - Good MIL & MOA based reticle options. Good glass and very tough scope. Has illumination.
I see many recommend the Nightforce 2.5-10x42 - I would recommend you look thru one as the reticle is very thin and can be hard to see in low light and dark backgrounds. I believe one version is illuminated as long as you don't mind relying on illumination.
Last the SWFA Fixed 6x or 10x both weight 20.7 oz and can be dialed with MOA and MIL options. Glass is fine but not "premium" and would never limit you on a hunt. Good reticles. The 3-15x42 is 24 oz and is one of the lighter reliable FFP options out there. Has parralax and all that if you are looking at something that would extend your range a bit.