The trick with mono is to replace it quite often, and if you are going to do that you might as well buy relatively cheap stuff.
A 50 metre spool of Shakespeare Aerial sea fishers' tournament shock leader in 40lb bs costs the princely sum of £2 from Mullarkeys and will make 2 lovely 25m shooting lines at a quid apiece, good for 5 or 6 trips.
http://www.mullarkeys.co.uk/fishing/...akespeare/880/
Who needs more ? If you can not only regularly cast 37 yards plus in day to day fishing conditions, but can also land most of what you hook at that range, then fair play to you sir