If you can part with the money, the monarch is a great choice.
The difference in scopes mentioned goes like this.
Monarch - great glass and fully multicoated , no side focus for higher power A.O. scopes. 95 % light transmission.
Buckmasters - really good glass , multicoated but not fully multicoated and higher power scopes are offered with side focus A.O. 92 % light transmission.
Prostaff - really good glass , multicoated but not fully, 90 % light transmission.
Burris fullfield II - really good glass , fully multicoated , 42mm Obj. , no side focus for higher power A.O scopes. about 94 - 95% light transmission.
Bushnell 3200 - really good glass , multicoated but not fully , rainguard , no side focus for higher power A.O. scopes. about 92 - 93 % light transmission.
Bushnell 4200 - great glass , fully multicoated , rainguard , no side focus for higher power A.O. scopes. 95 % light transmission.
Weaver grand slam - really good glass , fully multicoated , no side focus for higher power A.O.scopes. about 92 -93 % light transmission.
From what I understand, the warranty service is about the same for any of these manufacturers. As far as most dependable product goes , I know the Nikons are great , and I have heard the Bushnell 4200's are great. The buckmasters I know work well, I own 4 of them. The 3200's and Fullfield II's are supposed to be really good but I have no experience with them. The Weavers, I have not heard anything about and have no recent experience with.
Hope this helps. Here is a link to the Nikon Monarch, and you can go through the site to checkout the others, if you so desire, from this link. This place has the best overall prices I have found.
http://theopticzone.com/detail.aspx?ID=2343
Merry CHRISTmas
Light transmission percentages submitted are from the individual scope manufacturers technical support departments as of 12-21-2006.
As per Weaver , anything over 90 % is very bright , and the difference between a scope at 90 % or one at 95 % cannot be distinguished by the naked eye..... But I do not agree with that philosophy. MET