ATN is as cheap as I'd go as I've looked through them and saw them work for multiple years.  We use ours for deer depredation so they're farm equipment at tax time, along with guns, suppressors, and ammo.  Our rigs have the best ROI of anything we own, hands down.  We're running the now-discontinued Pulsar Trail 2s.  Only reason I'd upgrade would be for the day/night combo, just for ease of zeroing.  I've zeroed thermals multiple times and it's a lot harder than the one-shot zero they all promise.  Buying today and the day/night mode piece of the puzzle aside I'd probably look hard at ATN's top-of-the-line scope.