Although it pains me, I'd go with the 30-06. The 44 and 30-30 are both great calibers for 120 yds and in for deer size game and maybe even something larger. You'll get more versitility out of 30-06. The 44 and 30-30 are great brush guns.
Grouse, relics? I mean really?? Aren't some of the best cartridges out there "relics"? 45-70, 44-40, 30-30, 44mag... its seems like I'm forgetting one... oh yeah, the 30-06.