If you want a red 325i go for it, but if you always have to park it outside & want to keep it looking nice for a long time spring for the clear silicon treatments...I wish I had!
I have a 1996
red 318Ti which I waxed twice a year & parked it outside(I have no garage). My paint is fading & some of the clearcoat is flaking off. Still,
electric red is my favorite BMW color lookwise.