Tiagra 30 or 50

I'm planning on chasing some marlin and am trying to choose what 80#
setup to get. I've narrowed it down to a toss-up between the Tiagra
30WLRS or the 50WLRS. I'll be stand-up fishing so am leaning
towards the smaller reel, but I'm wondering if anybody has used one
of these in anger yet - as I understand they're reasonably new on
the market.

From the specs for the 30W, I gather I should be able to load 800yds
of 80lb braid on it with somewhere in the region of a 100yd topshot
of 80lb mono. As the strike drag on the 30WLRS is capable of 12.5kg
(27.5lb) while maintaining freespool, it seems like it should fit
the bill (pun unintended).

Any views?