I know this is gonna run half a dozen people the wrong way. I will apologize in advance.
Your scope isn't what "gets you to 300yds" or 4 or 5 or 1000. Yes you need the proper optic for the proper application, but it has less to do with power and range, than it does with what you want the scope to do.
If you are shooting static ranges mostly, you can get by with less bells and whistles. If you are shooting tiny groups you need more top end magnification. If you are shooting something like Designated Marksman with widely varying distances power is not quite as critical as long as it is enough, too much is worse than the minimum in that instance. Minimum is about 1x for every hundred yards, but developing loads can require a bit more than minimum if you are actually testing the loads "at range", which I highly reccomend.
I own numerous high end scopes, and have owned plenty of Chinese and Japanese junk. If it comes out of LOW (Light Optic Works)factory from Japan it isn't bad stuff, the high end Bushnell's come from there, and so do SWFA. Tasco used to come from there, and they were good, now they are sourced from China...Junk.
Numerous companies have excellent customer service. Just because a company will send you a new scope, doesn't mean their product is great, it simply means they have a very high profit margin.
Beware the free scope lollipop, it's a trap.
Used scope sales are a fairly good indicator, of the overall reliability of a scope.
Any scope can go TU, I don't care what you paid.
If I was in your situation I would get an SWFA mil/mil 10x with milquad reticle. It is the best all around scope for the price available. After you have sent several thousand rounds downrange with that, all the while stuffing money in your sock drawer, I would make a jump right past the mid level stuff and get a Razor, USO, or Mk 6 Leupold. I might also consider A Bushnell HDMR although the first one of those I ever saw was TU right out of the box.
The absolute last choice I would make is a Nightforce.