Antec PlusView1000AMG or upgrade???

[immy]

I have currently a Antec PlusView1000AMG case, which has room for four 80mm case fans + 1 side fan for cooling.

Im looking to upgrade to a silent pc build. Upgrading the PSU and the case fans to something more quieter.

Should I install quiet components into this case or upgrade my case to the Antec P150 or SLK3000B which i understand have bigger diammeter case fans.

Is there a worthwhile second hand market for cases if i was to sell my Antec PlusView1000AMG case?

 

[immy]

I know my cpu fan is loud, and the PSU fans especially are very loud...so they are the first to get replaced.

Anyone reccomend a cpu heatsink+fan which isnt too loud yet still able to cool?
I have an Athlon XP 2500+ chip. I think its socket A design motherboard.

And im going to go for the Hiper 580w type R psu to replace my QTEC PSU.