As with most optics, there is no "best" - only best for you. Optics, like rifle calibers, are always a compromise.
For this past year's elk hunt, I purchased an itty bitty Nikon 50 ED scope body, from Japan. When it arrived, it felt like a toy it was so small and light, but the optics are no joke. At first I had some adapted 1.25" astronomy eyepieces, but I eventually found a second-hand 13-30X Nikon eyepiece at a very good price. That eyepiece is still very small and light and suits the scope really well. I give up some field of view vs. the astronomy eyepieces, but gain the zoom feature - a good trade-off IMO since I do my "searching" with tripod mounted binoculars and not the scope, and only use the scope to verify cow/bull/legal...
Along with a very lightweight tripod and ball head I picked up on Amazon for about $35, the unit disappears in my pack. Several times, I meant to take it out but forgot, and I never even noticed it was in my pack until I was searching for something else on a day hike. It's that light.
I think you need to give some real consideration to how you intend to use your scope. Are you using it for glassing or just verifying legal animals once you've located them? Are you just trying to determine if an animal is legal, or are you looking to score one on the hoof?
I can tell you that with decent late evening light, I was able to confirm that a group of bulls were all legal (4x or better) from a measured 2.4 miles away. That was with the Nikon 50 ED and a 17x astronomy eyepiece. That was all we needed for my buddy to kill his first elk the next day.
If you decide to go the 50 ED route, let me know. I have a spare astronomy eyepiece that will fit it.