I've been very impressed with my UHD 10x50's that I got this fall. Earlier this year, my dad actively chose the UHD's OVER the Swaro EL's and the NL's after we tested both for about 2 hours as the sun went down. We were glassing deer at several hundred yards towards the west (so towards the sunset), with tons of snow on the ground, so tough conditions for sure and would easily have shown any deficiencies in the glass. We both preferred the Vortex. Better color fidelity in the UHD's, overall brighter view to us, and we both absolutely despised the facial ergos of the NL's. But yes, the UHD's are physically large for sure. If you're good with that, then I say go for it. You'll be happy with them.
Bottom line, test as many as you can before making the purchase. Everybody says "Swaro" just because swaro is the best, right? But not to everybody. To my eyes, I hate the bluish-green tinge of the Swaro glass. They're sharp and clear, but it's not comfortable for me to look through for a long period of time. But to other guys, they're fantastic. My hunting partner's eyes prefer the Zeiss to Swaro and Leica, and actually also prefers my UHD's over the Swaro and Leica as well. But other people think both of us are nuts! It's a personal decision, so test everything you can before throwing down the cash!