New GPS?

My old Garmin FR 305 is dying. I want to get a new gps watch for running but want to use it for track intervals as well. My old 305 only has whole seconds for splits. Anybody able to tell me what GPS can be used as a stopwatch with milliseconds support? I want to know I did 400m in 75.32 not just 75.

Do you want to see it right on the watch at the time or after the fact? My Forerunner 220 gives me splits with tenths of a second right on the watch when I hit lap - ie. 75.3 (well 1:15.3 actually) but when I look at the data in Training peaks it will have it to hundredths. 1:15.32. Also, if I look at the splits on the watch in the history (after saving the workout) they are in hundredths of a second.