I also have two Tag Heuer's and two Sector's Tag's are great but I would not recomend Sector, I tend to tear them up a little.
I wear the Tag's and Omega during military Ops, Patrol and wrenching on cars...No problems. The older Tag bands were kinda weak but the newer ones with solid links are tough...
Mine is a cheap Timex Ironman with a 30 Lap memory. I used to be a runner so i used it then, now i just wear it everyday, cause i'm not a flashy guy, a plain black watch is fine.