well if you are getting a peltier, you will need to mod your heatsink or get another one

i dont like pelts
ive seen condensation forms easily on those when temps are so extremely opposite on both sides

i would just get a watercooling setup such as Koolance EXOS
its an external kit that isnt loud and doesnt take much time to setup if that is your main concern

or try dangerden.com's MAZE4 kit
excellent performance for a very reasonable price

quality make too

or just get a heatsink from thermalright such as the SLK-800 if that fits on your mobo
and fit it with an enermax 80mm adjustable fan
thats very quiet and moves alot of air too
so the best matches in heaven is there
i dont think the SLK-900U would fit your mobo so thats not one of the options


btw i dont think you need that fan on top of the PSU
not much air is going there anyways
unless you need it to suck some air out of the case from those CDR and HDD drives you have at the top


and yeah, pics work now

edit: btw i think the main annoying noise is coming from that fan on your vantec cpu heatsink
definately needs to be changed
get a whole new heatsink fan combo or seperate is up to you
just look for fans that are less than 35 dba and you should be fine