What do you want to use it for?
Seen far too many (myself included!) go out and buy 'the best' be it a PM2, Z8i or whatever when a smaller, lighter scope would have worked better for them and cost lest.
A Ferrari isn't good for shopping and school runs much in the same way the new Land Rover doesn't belong on a farm
Ask yourself, do I want or need:
First Focal Plane reticle (theoretically better for targets, but worse eye relief)
Side focus/parallax (again, theoretically better but it's another dial to move)
Elevation and windage turrets (do you 'dial up' often? Do you really need a multi-turn option?)
Reticle illumination (very very few are daylight bright and many of those who night shoot still prefer an unlit reticle if using a lamp- although thermal/NV scopes may soon make the lamp redundant!)
Tube diameter- (1 inch/30mm/34mm/40mm??!) Bigger is seldom better!
America is by far the best place to buy the cheaper, lighter scopes (Leupold, Vortex, etc with discounts and rebates) but for the very top tier Euro glass (S&B, Swaro and Leica) then UK prices are still competitive, for the time being!