I used FedEx for the last couple bikes I shipped and it was pretty close to $60 as I recall. Check prices on their web site. I plugged your numbers in for shipping from Mpls to Denver and it was $47 without insurance ($50 with $500 insurance).

The box size makes a big difference (as does the distance that it is shipped) . I have also modified my packing boxes in the past to get the smallest possible size which can reduce the cost considerably.