By longer stem are you refering to taller or longer reach? I have been considering a taller stem and maybe a shorter reach of about 60mm.

In my late 30's I was riding about 150 miles a week. (excluding the crappy Indiana winters) I am anticipating 100 mile weeks this year so I am not doing day long rides and probably won't. There are not many 60+year old crazies in my area. Solo day long rides can get lonely.