The original post is too vague in my opinion to generate a useful answer. We need things like budget, what you are shooting, and any spec requirements you may have.
Agreed,
What sort of reticle do you want? dot, crosshairs, some sort of Christmas tree type?
Does weight matter?
What size tube do you want: 1", 30mm, 34mm?
What magnification range do you want or do you want a fixed power model?
For true target shooting you might want a fixed power 24x, or 36x or 50x? None of those will work for you the instant you leave the range and take it hunting or varminting should the opportunity arise.
Hoe much do you want to spend? Without knowing your budget you are going to get all kinds of recommendations, from cheap Chinese knock offs to things like March and Schmidt and Bender.
That said, without knowing your budget you should perhaps look at Hawke's rimfire scopes. They make a wide variety of variable power scopes for air rifle and rimfire and are relatively reasonably priced ($500 and up new, and they come up used in the EE now and then).
Not to be a Debbie Downer but most .17 HMR's are not what I would call high precision instruments, more like minute of gopher. Given the cost of HMR ammo, it's a curious choice for a target only rifle. For the same or less $ than standard HMR ammo you can buy true match grade ammo for .22 LR from Eley, RWS and Lapua. No one makes match grade ammo for the .17 HMR so if your plan is to shoot for smallest groups it's going to be a very frustrating experience.