Get the best scope you can afford to get. About 20 years ago I got a Leupold Wind River spotting scope (45x at max power). Pure junk. It will not see .22 caliber bullet holes at 200 yards and has a real hard time showing .50 cal bullet holes at 500. Holes that I can see clearly through my 25x Leupold VXIII are almost lost in the Wind River. If I had only spent a few more dollars on the Gold Ring scope I would have been much happier with it. I still have not upgraded for a variety of reasons, mostly laziness, but when I get around to getting another it will be a high end spotter that will let me see at least as well through it as I can through the scope. If you get Leupold, go Gold Ring or forgetaboutit.
There are many high end spotters that will run you over a grand and if you can afford them, get them instead. I have peeped through many of them when shooting NRA HP and they have no trouble seeing .308 caliber holes at 500/600 yards, but you pay dearly for that kind of resolution, and resolution is the key, not maximum power, and it is resolution that you pay for.