[nickw311]

I recently bought a 17" 1.8 G5 (no iSight) iMac on craigslist and thus far like it a lot EXCEPT for the one problem that it is LOUD.

I want to replace the standard 80 gig HD with a larger one and in doing this, is there any particular model that I should look at or look for that is (a) quiet, and (b) runs cooler so as to not make the CPU fan spin any faster?

Edit: this model takes a 3.5" SATA HD.

[zerostar]

if you want 500GB I would vote for this drive....
Newegg.com - Seagate Barracuda 7200.12 ST3500418AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive - Internal Hard Drives
1 Platter of 500GB goodness! Puts this drive just as fast as my Western Digital Black drive!! (if not faster)
Lower power consumption keeps this drive quiet and cool!

Otherwise if you want bigger... I always recommend the 1TB Western Digital Black (What I run at home and work). If you REALLY want cool in leiu of speed get the Western Digital Green series (very low power and quiet drives)

[macfix]

I second that Seagate, and also agree about the WD Black.

[P]

I doubt that replacing the HD will decrease the noise significantly - those iMacs have loud fans, more than anything - but if you're interested in cool and quiet parts, I recommend this site.