I have a 60# Manson Supreme (Rocna knock-off) on my 37 - and do I sleep well at night! :-) Works beautifully. No way could I also fit a CQR on the bow at the same time - but I'm really not sure why I'd want to anyway.
The Manson fits in the roller well but the retaining pin was never a good fit for the old CQR and indeed isn't for the Manson. I manage keeping the MS in place by tieing a line around the roll bar of the Manson and securing it to the Pulpit. It's quick and easy to tie and to undo and very secure. It also is used to tie the anchor upside down on the roller when on the mooring - to prevent chafing the mooring line.
The Anchor gets lots of comments and is one of the best upgrades I made to the boat!