Emglish Braids bought Marlow Ropes. I prefer English Braids as their pre-stretched polyester is easy to splice and soft to use. Been using them for over 10 years on my Vega and no problems.
I prefer Marlowbraid for halyards, but it's not a soft rope. Lower stretch than braid on braid, no more expensive, easier (for me) to splice. Against these pluses, I don't specially value softness or feel for a halyard.
Marlow publish rope stretch data somewhere on their web site.
Alladins Cave are doing good deals on Marlow rope at the moment. Choice between MarlowBraid or double braid. Double braid is cheaper but less strength.