I'd say to go with a Hawken style rifle. The shorter barrel will feel better in the woods, especially with thick cover.
150 yards IMO would be maximum with open sights and off hand shooting.
CVA Mountain Rifle " Highly recommended!"
Lyman Great Plains " .54cal is your best bet!" Lyman makes a good quality piece and they are accurate.
For me, It'd be a war between the great plains rifle and the cva mountain rifle.