You want musk? Check out Narciso Rodriguez For Him Parfum Intense. You can get it for $99.95 for a 100ml bottle from feelingsexy.com.au...
This might be a bit out of your price range, and I understand that, but it's the deepest, richest, thickest, sexiest thing I've ever smelled in my life. It's full of musk, but in a very manly way. It's hard to describe - probably best to try it yourself. I tried it myself at my local David Jones (The Tester they have for the Narciso Rodriguez For Him EDT is actually the EDP intense, which is a little shonky, but hey it gives you a chance to try it yourself). Just note that the For Him EDT smells significantly different than the EDP intense, to the point where you could probably happily own both they're different enough (if you want).
One thing that I love about it so much is that it's an absolute BOMB. It's strong as hell and easily lasts all day with huge sillage. You end up paying a little more, but you get something that is twice as strong as anything else in that price range, and easily twice as amazing in terms of scent quality. I seriously can't sing the praises of this stuff enough.