Based on the OP's post above it's too late, but I also vote 6wt because it will cast a much wider range of fly sizes & weights with ease and is therefore more of an "all around" rod than a 5wt.
Of course if the 5wt rod is a 5wt rod in name only and it actually needs a fly line 1/2 to 1 size heavier to get it to flex, it's a moot point... 😉
Regardless, a lot of folks these days are terrified of anything heavier than a 5wt for trout and think a 6wt is too heavy and not "technical" enough which is total nonsense. Heck, Orvis peddled an 8'3" 7wt called the "All Rounder" way back in the 1980's and most trout fishermen plying bamboo & fiberglass used 6 & 7wts successfully and many still do including me.
One of my first rods was the 8'6" 6wt graphite Orvis Limestone Special. It was my go-to rod everywhere including the Letort where I STILL prefer a 6wt. I also fished that Limestone Special at all of the SC limestoners, the Poconos and the famous Catskill streams, not to mention at the NYC reservoirs and other places for bass and panfish.
Regardless of my preferences, I hope nOObmater enjoys the new outfit!