Yeah, the mast-head spinnaker bail is what you want. It will get the spin halyard further forward of the main mast section and help to prevent entanglement. Especially if you plan to use a chutescoop/sock, which are bulky and need some space up the top.
Our boat has LeFiell's single bail version
, which works great. But our masthead headstay toggle is tucked in close to the masthead assembly. It looks like the headstay toggle on the 37 protrudes quite a bit further, necessitating the split bail seen on Talisman's masthead.
I wouldn't at all mind having that split bail with a spare spin halyard, or at least a messenger ready to go.
P.S. Arisatx, good thinking to take a photo of the masthead. That will come in handy...