what's the noisiest fan right now ? and what are case temps like ?
tbh, water cooling isn't really needed for a quiet system any more (and I've got it)
if you want a new CPU cooler, this is the one to get
ebuyer linkfor the gfx card... you might as well get a new passively cooled card - you could get a new, better, passively cooled card for about the price of a quiet/passive cooler for the card you have... what you get just depends on how much you want to spend.. and tbh I'm not that up on gfx cards to recommend the best one... if you don;t game much.. just go to ebuyer and just pick a passively cooled amd card for about £50 and you'll be sorted
for the m/b cooler, it just depends on what m/b you have and what's available... post up the model of your m/b and I'll find you a decent one ;-)