I too have a model 700 rem (that my wife now uses) which i'm very happy with. I highly recommend the in line if for nothing else the consistency of the firing. Two buddies of mine had misfires with the old hammerbacks this year and that is no good.
As for bullets I really like the accuracy of the powerbelts, and they load oh so nice. Like dogfish said that triple 7 powder is some good stuff. Pyrodex is a dirty burning powder and that make for a lot less shots between cleaning and a lot longer to clean. I use powder with speedloaders so I'm not sitting there measuring out while I'm hunting.
I put the thompson center fiberoptic site on mine for a couple reasons. Those plastic sites that come with most guns will brake off (seen that happen) and the adjustment's on the tc sight are really nice.
These guns can be accurate well past 100 yds but I would never shoot at an animal that far away. Wind makes a big impact on such a slow moving bullet.
Good luck to ya