I toured for several years with a Jamis Nova. Everything from overnighters to several weeks fully self supported. Had front and rear racks and 4 panniers. Never had any problems until my last tour when I broke a rear spoke. I weight about 185 lbs and usually had a load of 40 to 50 lbs on the longer trips. Combination of paved and dirt roads. Can't comment on dropping off of curbs, I guess it depends on how heavy you are. Hope this helps. I would say go for it and have fun.
Cheers