I went through the dilema a few years back on whether to go S&B, Nightforce or USO. I had seen too much bad press on USO to pay that kind of money for a premium scope. I ended up going S&B 5-25x56. I haven't regretted it. I also have a Nightforce NXS 3.5-15x50 on my .223AI and it's a decent scope for the money. The one thing that really made me consider the USO was the reticle options available...Best selection bar none.
Lastly, had I to do it today, I would seriously consider a Premier Heritage.