I currently own several kimber's, 2 kimber of oregon's, several coopers, a few sako's, a nosler 48, a heym, and several customs. I've taken game with many of these rifles and they are all great! That's why I still have all of them

.
It really depends on what your looking for in your rifle, the new production kimbers are all light, the montana's are lighter but the wood stock kimbers are also light. Accuracy issues (for the most part) have been resolved, there were a few bad montana's at one time but that time has passed. Keep in mind that they are light weights and the barrels heat up fast. There will be bad apples in every mfg but don't let the naysayers scare you. The kimber triggers are by FAR the best factory trigger that I own and I think these rifles are the best bang for the buck when you buy new today.
Kimber of Oregon rifles are beautiful, if you can find one.
Cooper fit and finish is very good, accuracy is very good and they are nice looking. They have a bit of weight to them, I've carried my excaliber a fair bit and you don't forget that it's there. The Cooper trigger IMHO is the downfall, it's very well made but a trigger with round sears is not consistant or reliable. Sometime's the trigger pulls light sometimes its heavy. It's hard to adjust and just plain wierd. For a $2000 rifle you shouldn't have to "make do" with an inferior trigger. If I could put a kimber trigger in the cooper I would. Keep in mind that Dan Cooper started his company after his carreer at Kimber of Oregon.
Sako..... AV's are the best.

A good used AV $1000 ish will serve you well forever.
I shot a moose this year with a Nosler 48 300wsm. Great rifle, decent trigger it never let me down. I like it alot. It uses rem 700 scope mounts so it's very easy to find an inexpensive mount that you like, I used talley lightweights.
I just got my first heym, it looks great. It's an SR 30 with the straight pull bolt (very cool

). I haven't used it yet but fit and finish are top notch. Cons, expensive and limited scope mounts and a long LOP (typical of euro rilfes) I will have to get the stock shortend for my stubby arms. Also euro rifles are quite often built with twist rates that favour light bullets and they don't shoot heavy's that well, check it out if you look at one.
Customs, some work some don't. Try some factory rifles out before you build so you know what you like then you don't have to sell it and take a sh!t kicking! I have a 6mmAI rem 700 in an hs stock with a gailard barrel built by guntech that's a great rifle. IMHO use older rem 700 actions (60's-80's vintage) anything from 90's up are not as desireable in my mind. Great part about a custom remmy is that there are so many parts available and most (if not all) smiths will work on them. If you have to sell it you can always part it out if you have too. Old 700 triggers are good too, xmark pro triggers stink!
To sum up, IMHO you need a kimber for mountains, a cooper for the prarie, a sako just because and a couple customs just for fun!
