The 77mm particularly in APO configuration is still stunning glass.
It's big and it's heavy, and it lacks a wide angle eyepiece offering...the only drawbacks other than opinions with Leica's service.
Few scopes still compare especially at it's price point.
Head to head, the 77mm still holds its own with the big Kowa 88, the newer Leica 82, and Swaro's big objective offerings.
The 77's are a bargain these days.