I can only speak of what I use. I have a Sage SmartGrinder Pro (£160ish on offer), and a eureka mignon specialita (£300-ish)

If I were spending more, I'd go with something like a niche.

Plus points on the SG: It's dead easy to use, and makes decent coffee.
It's a little noisy (nowhere near how bad some machines are, however).

The Specialita is fantastic. The main reason I got it was for noise reasons, it is extremely quiet.

However, I put a lot of weight to set-and-forget convenience: The timers means once I have dialed in a bag of beans, I can press one button and get a precise dose, without using scales.

What you want the grinder to do is probably the most important question. Hand grinders are the best value, but you may soon get tired of winding every single cup.

I've been a long time Comandante C40 mk3 user and have been impressed with it. I don't think you could go wrong with it. But if you're looking for something that gives a cleaner profile, I suggest looking at 1zpresso's offerings. I recently bought a ZP6-Special and it has been winning me over. It is however only for filter coffee and not suitable for espresso (if hand grinding for espresso is something you do).