Razor UHD: Legit Alpha Class binocular, easily, no matter what the nay sayers say. Had a pair for a couple years and never wanted for more optical performance. Sold because I suffer from GAD (gear acquisition disorder) and love trying gear.
Razor HD: step up from your vipers, and can be had on Sierra right now for like $650 shipped. Though that step is admittedly very small.
Maven C1: not sure why people are saying they’re a downgrade from the vipers, but having owned a pair for a few years in the past that isn’t the case. They’re a little sharper and clearer than the vipers with superior color fidelity and pop, but have a narrower field of view. Optical performance is closer to that of the Razor HD (but still with better color through the mavens), except for their narrow FOV.
Maven B2: great optics, alpha class, the 9x is the darling of that line. Maven is having a March madness sale right now and you can get the B2’s for $850 in a bundle with a bunch of other goodies. Worth the price of admission. But be warned, they’re large and heavy, and if you’re sensitive to the field flatteners in binos the B2’s get rolling ball bad. They made me sea sick and gave me a headache while panning, which is why I sold mine. But stationary on a tripod they were unreal.
I would recommend you add the Maven B1.2 to your list if you want an 8x bino. Very compact and great FOV, and lots of guys on here love them. If you are interested in a 10x50 again, the Maven B6 is a fantastic optic that is physically the size of 95% of the x42 binos on the market today. The B6 and B1.2 are the Goldilocks options from maven currently, though that deal on the B2 they’re running is awesome, assuming the field flattener doesn’t mess with you.