d00d
wise choice i must say.
i am driving a gen2 and my bro, a vios.

my car's roughly 4-5 years and yes, rattling can b heard everywhere and when ure driving on a slightly bumpy road, my gawd, its like ure havin a band with you or something.

and just recently, everything is starting to fall apart..lulz..and my whole exhaust system was screwed due to wear and tear (extractor bocor, cat con clogged, muffler rusted, etc etc)

my bro's vios's about the same age, and recently, he got crashed by some drunk joe while returning from genting, and my gawd was the car in terrible condition but yet, after the repair, i still dont hear any rattling sound.
try that on a proton and i promise u, ull have ur very own personal orchestra on board.

i know vios's been branded with this "big big geeteewinngggg ohh" label but heck, a good car's a good car.