If you are mostly going to be off a bench, an Anschutz 64 is pretty good. If you want to shoot ARA stock/factory (what ever it's called) they are considered "unlimited". Oddly enough, a Weatherby Mark XXII (really an Anschutz 64) is on the approved list for ARA factory/stock class...I have one, and if I find an ARA benchrest match that isn't too far away it will get pulled out of the safe an a nice scope mounted.
For offhand, Anschutz 1416AV, 1712AV, 1712 Silhouette would be good. I have a 1416AV and a 1712AV, they are great. I also have a Vudoo Three-60 in an MPA BA Comp chassis, accuracy it outstanding, shooting offhand with it not so much, it's heavy (over 16#). Vudoo are awesome, but even their lightest model with a carbon wrapped barrel is still quite a bit heavier than I'd want for any off hand stuff. Anschutz 1710 HB is a really nice rifle too, but also heavy.