I've used Optilocks, Leupold, Millet, Conetrol and Talley mounts on my Sakos. I don't like the Leupold system and absolutely detest the Millets. The Optilocks are okay, but they're a little high and those rings screws are just awfully soft. I don't have much experience with the Talleys yet as I just this past weekend mounted my first scope in them (first time using Talleys on a Sako, that is). These Talleys are lows and may be just a smidge lower than the low Optilocks, but there's not much difference. The Conetrols are nice looking mounts and are the lowest I've used on a Sako. In fact, medium Conetrols are lower than low Optilocks. Here's a picture of them on a 75:
I've checked into the Near Mfg. bases and found that the minimum taper they had (at least at that time) was 25 MOA. I didn't want a base with that much taper.