Thank you for your input. Moving beyond these 10x42 vipers and Maven c1s - what would be the next level up? I've been reading about leupold bx4s, zeiss conquests and meopta Meostars - all being good glass for under $1,000 but there are literally endless threads of opinions on glass...
The BX4's will be essentially an optical match to the Viper and C1's. The Conquest's and Meostars should be the next step up.
Here's something to consider. I always recommend to people that you save for as long as possible and buy less pairs of optics but a better pair of optics each time. If you buy your entry level binos, then a $200 pair, then a $500 pair, then a $700 pair, then a $1000 pair, then a $1200 pair, then an "alpha" level pair, you'll spend so much more money on that last pair in the long run just because of the losses you've taken on sale of your other binoculars.
Here's the math. The first number in each equation is what you buy them for and the second number is what you can realistically sell them for. I'm going to use Vortex's lineup as the main catalyst for this math, just because they have one pair in each of these price categories, but the same can be done swapping in other optics companies.
Diamondback HD's: $260 = $260 (don't sell because you'll need an extra/truck bino) loss
Viper HD's: $500 - $300 = $200 loss
Razor HD's: $1000 - $700 = $300 loss
Razor UHD's: $1500 = $1500 spent
If you add all the totals up, in order to pay for one pair of truck binos and one pair of the UHD's, you've spent $2,260.00. If you just buy the Diamondback's and save until you can afford and buy the UHD's, you're $1760 into the same end result, leaving $500 for tags and other gear upgrades along the way.
Again, you can swap in Leupold Alpines on the low end and Swarovski NL's on the upper end. But if you spend tons of money buying just small incremental increases, you'll end up spending so much more money to get to the end result of one backup pair and one high end pair.
Not everybody needs or wants alpha glass either, so that top end of where you'll spend money will change depending on what you want from your optics. But the concept holds true. If you are plenty happy with a $500 pair, then buy as few pairs to get to the $500 pair as possible and spend the other money on more gear and tags.