I guess a lot depends on what you want to do with the rifle. For plinking, 9X is often enough, as many have said.
I had a VX-2 3-9x33 EFR and sold it after a while, not enough magnification for the target shooting I was doing. Nice little scope, although I had trouble getting the ocular lens close enough to my eye without using offset rings. They're quite short.
I will say that side focus vs AO is a nice feature, particularly on a plinking type rifle.
For target use, it's not a deal breaker. Once you're dialed in for focus at a given range, you don't often change it, whereas if you're shooting different distances (plinking) AO can be a minor PIA.
I have a VX-2 6-18x40 AO with fine duplex reticle mounted on an Annie 54 that I'll be buried with, very good scope for the money.
If you don't mind Vortex, look at a Diamondback HP 4-16 x 42. Glass is quite good, they have a nice reticle (BDC), and side focus as close as 30yds. I've got 2 of them, one on a .22 452 Varmint, the other on a 243 Tikka. Both have been good.