is water cooling better for cases with limited air flow (details inside)

rivencole

Distinguished
Dec 5, 2008
4
0
18,510
wall o' text warning.

so, i am making a case mod/custom case from a 30mm (not caliber) ammo can. internal dimensions are 17.5"(d) x 14"(h) x 8.375"(w). after the slide tray i will build i have about 6 inches of height for a cooler to work with (if air would work better), and already have an air cooler picked for that if need be. problem: i am not wanting to put fans all over this, so as to keep the look intact, so air flow is minimal in the form of a 58 C.F.M. 120 intake low on the case to cool the HDD cage and either a 80mm exhaust on the lids behind the cpu cooler (if air) or a 120mm water cooling radiator. the graphics card (EVGA GTX 660 SC) expels its own heat from the case with a sealed blower style cooler power supply will be mounted in a way that allows it to vent case air out as well.

before i go further here are the specs for reference (bit of a spare part Frankenstein)
CPU: Phenom II x4 965 (temp till i get a better one)
Motherboard: ASRock 970m pro3
RAM: 4 x 2gb gskill 1333 (laying around. gotta love this stuff, 6 years old and still kicking like a mule)
GPU: EVGA 660 SC 2gb
HDD: 1x WD caviar blue 6400AAKS 640gb + hitachi 7K1000.C 320gb
PSU: EVGA W1 500w

so considering the hardware and what i am using for a case with its subsequent airflow limitations, would water cooling the cpu be more effective? i apologize if this is already covered, could not find quite what i was after. also sorry if it is a dumb question.
thanks in advance.

EDIT: for reference i am thinking of using a corsair h60 or similar, since the case when completed probably will not fit a full custom setup. that and i have never really had need for water cooling and as such have little experience with setting up water coolers so i am going simple at first.