I suppose it doesn't really matter in the grand scheme of things. I recently reread volume 1 and there's enough intrigue there. Wanting to find out why Guts is such an asshole and what happened to him. I do think going into Golden Age blind would have the greatest emotional impact.
In an ideal...
Primarily reading Gantz; at like chapter 150 or so. A fun, absurd read but not something I'd recommend if you want a serious or epic story. Other than that. re-reading some Berserk in honor of the late Kentaro Miura, occasionally reading Yawara! and Claymore as well.