targa is the win for fun in the sun.
just the other day, loaded my car with 700lbs of people, took the top off and went on a drive into the "country side" to this place that has AWESOME hand-made burgers. 3/4lb burgers, with steak fries and a sweet tea for under $9. then, on the way back, i hit the twisties. both my passengers knew the route since all the roads are known by guys w/ sport bikes. theres alot of low speed technical stuffs, sharp turns, increasing/decreasing radii, banked turns, blind turns, etc. the car did pretty well. alot of 40-60mph stuff w/ the top off. the car didnt understeer ONCE. it did power slide alot coming out of the turns though. there was shake from my windsheild and my front end seemed to shake at a different rate/direction than the passengers going over bumps/tracks but it definitly held the road better than a taurus or anything else that is not meant to corner. i also left the top off ALL day, i just put my sweater on when it dropped into the 50's; it was great!
on the ride home, i have uneven pavement and i could HEAR the chassis flex as the door panels rubbed against the dash. i put my thumb and forefinger on the gap between my door and dash as i rolled over the broken pavement. it really only flexed on the matter of a few mm. its the same amount of movement as you would feel when you leave the front targa bolts un-tightened (threaded but not torqued) if you put your fingers on the weather stripping. its minute but you can feel it. and beleive it or not, a 0.020" to 0.015" gap/movement/step is QUITE tangible despite how miniscule it is.
EDIT: nevermind on the flex... i did the same "test" w/ the top bolted on and the door panel moved just the same as it did w/ the top off. i think its just the doors moving... idk.