If you think the Hogues are too narrow up top, then the Ahrends will definitely be too narrow up top. They're barely wider than the grip frame (okay, that's an exaggeration of course, but they do feel very narrow). Even the retro targets, if I recall, are fairly narrow. The Altamonts (like on Bullseye Smith's gun) feel just as narrow up top, in my opinion. If you can, try a set on your gun before you buy them.
I happen to like the narrow Ahrends grips; they direct recoil into the meat of my hands, whereas the wooden Hogues direct recoil into the bones (no idea on how the rubber Hogues do under recoil, but I don't like the way they feel anyways, so I'm not inclined to try...). Even the heavy recoil of .44 Magnum is manageable, for me, with these grips. I imagine the Altamonts will feel similar...