I think either would perform quite well. I think I would go with whatever you like the look of best. Weber carbs are In my mind pretty user friendly. But I have not seen the set up for a 223. Keep in mind the more carbs you add require at bit more in tuning skills to operate properly. What ever you do we sure could use some pics.
I was told that few people end up keeping all three of their triple carbs hooked up. They're just too tough to keep in tune. Offy is a great name to have on your engine, but I plan to go with Clifford (someday) for my 223. Maybe get an Offy valve cover.