I fish with a group of four guys and we never agree on anything, and this stands true for sinking lines. I have used airflo for years and they have a great coldwater lines- the Striper and the 40 Plus (a great sinktip ....
Flylines.com - Striper Lines Flylines.com - Forty Plus Saltwater
I use both the Airflo Cold Saltwater intermediate clear (1.5 per sec) and sinking (7" per sec) and the AirFlo Forty Plus. For the rocky shores and shallower waters the I use the Clear, for Jettys and sharp drop offs I use the WF--S7, and just got a new one last week
. I regularly have 3 rods with me to adjust to conditions and use 5,7,8 & 10 wt rods. I do have a sink tip on an extra spool that is the Airflo Forty Plus which has a the weight forward taper or sink tip (about 30') that is the super fast 7" per sec and the running part of the line is 1.5" per second. Nice line that I use for sharp drop offs, near the shore. You can control these lines by either waiting or retrieving immediately. I have lost 2 of the fast sink lines due to screw ups, but hey no risk no reward, I'll say this, when the blues are crashing the top 10-20' of the surface , these sinking lines can be the difference between catching stripers and catching blues..tight lines cb