The NF scopes are kind of in a 'niche'...there are the Leupold MkIV 8.5-25x scopes, but they are a bit light on the magnification compared to the NF 12-42x. I've had some problems w/ Leupold in regard to repeatability - several scopes worth. IOR-Valdada makes a scope in the 9-36x range for $1400-1500, and I've read some BR shooters commenting favorably on them when they first came out, but I don't hear much about them since, and I haven't seen any on the line at F-Class matches. I don't know of any reason why they wouldn't work, though.
U.S. Optics has some glass in the 40+ magnification range... but it's over twice the price of a NF BR 12-42x. USO enthusiasts might argue that its worth it, but I'd rather buy two NF and have a spare if I needed it.
Schmidt & Bender supposedly has some 12-50x glass coming, but its supposed to be in the $2000-2500 range.
After that, we 'drop down' to the fixed power BR scopes - Leupold Competition scopes in the ~$1k range, and the Weaver & Sightron scopes in the $400-500 range. For the money, I see no reason to get the Leupold fixed power scope compared to a NF BR series variable for the games I play.
Next tier would be the 8-32x range... Burris has some, but I don't think I've ever seen one at a long range match. Their internal adjustment range is pretty limited, which can be worked around by use of their Signature rings and inserts... Not sure what Bushnell offers in their Elite 4200 series in this range.
Lots of options to choose from.
Edited to add: if you look at today's bulletin over on 6mmBR.com, Sightron is bringing out some new scopes for 2008 - including a 8-32x56mm scope. No idea on how it'll hold up, but for $825 it might be another option for you.
Last edited by milanuk; 01-09-2008 at 10:41 PM.