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.