MK III battery

Did some searches on this forum and think I am more confused than when I started. Bike currently has a gel 9 amp hour battery that was in it when I purchased it, which I think is below what I need anyway.
Since the age/condition of battery is suspect, I need a new one. Any recommendations?

WestCo AGM 12V14L-B (equivalent to YB14L-A2)

Thanks!

YUASA
made in america YTX14AHL-BS correct size and post polarity for norton.
BS means it is shipped dry and you fill it yourself that way you don't get a shelf aged battery...acid is included.
$74.95 +s/h if you find the right place.
VRLA aka AGM
I use the equivalent AGM mounted on it's side in my Ducati 916/monster. So I figured it was OK for my MKIII. No more acid on the pipes. :mrgreen: