The Optilocks are nice mounts. I have used them on both of my Sakos. If they have a drawback, it's that they tend to be rather high. Also, the ring screws are softer than most. Other than that, though, they work fine. I've got them on my .300 Weatherby Sako and they've been rock solid. I really like those polymer inserts. With these there's no threat of marring your scope.
On my 7mm mag Sako I've switched to Conetrols because they allow for a lower scope mount. There's now only about 1/16" clearance between my scope bell and barrel, which I think is ideal, instead of about 3/8". The Conetrols seem to be every bit as stout as the Optilocks (maybe more so). The only drawback to the Conetrols is that they can be a real pain to get your scope mounted in them. But once mounted, it's a very solid setup and they are about the nicest looking mounts I've ever used.
Another ring you might consider is Talley. I've got them on my Winchester Model 70 and they are very nice. Leupold also makes rings for the Sako but I'm not too crazy about them. I've got Warnes on a muzzleloader and these might be an option although I'm not very crazy about the way they're finished.
In regard to the Leupold scope, I've had both the older Vari X-III (several of them) and the newer VX-III (3.5-10x40). The finger adjustable knobs are a nice improvement, although other scope brands have had this feature for quite a while now. I certainly prefer it to the coin slot. Optically I really couldn't tell a difference in them. Personally, I prefer the Zeiss Conquest to both the old and new Leupolds, but they are dependable, so you shouldn't have any problems with it.
