I posted a request for advice on scope in a previous thread for SR 25 6.5 14.5"-16" - Based on that input---I narrowed it down to either a Tangent Theta T315P (3-15) with Tremor 3 or SB 5-20 Ultra Short with Tremor. I know the SB has higher magnification and is smaller. I have had SB PSRs but never a Tangent Theta. Another possible concern is warranty issues on SB now perhaps having to go to Germany? I read some who have had both said TT has slightly better glass - better turrets - but not sure of durability? of either though the SB PSRs I had were trouble free. I will be shooting 300-800 yards. Any compromise going with the TT 15x vs SB 20x? Thanks much for the input.