Daddyjaxx, the PA120.3 uses G3/8 threaded fittings, not NPT. It's basically a larger version of the common G1/4 thread. And the fan spacing on the older models is wider, not narrower than the common 15 mm spacing of other rads (and the new 120.3 rads).
Also, skinnee was very impressed with the performance of the
BI GTX360 in his testing recently with medium speed and above fans, so I am linking to the review here and posting the dimensions below.
Other points: Feser is more efficient than the TC, XSPC or Swifty with med-high speed fans. XSPC is the most efficient with low speed fans. Swifty is bang/buck champ. PA120.3 is lowest flow restriction of all triple rads (probably due to the G3/8 threaded barbs, IMO).
BlkCamaro55, if you are worried about a triple rad fitting your case, here are the dimensions of the models as listed by the manufacturers or in reviews:
Feser X-Changer 360 - 411 x 123 x 62 mm
Swiftech MCR320-QP-K - 410 x 128 x 34 mm
XSPC RX360 - 410 x 125 x 58.5 mm
Black Ice GT Xtreme 360 - 397 x 133 x 54 mm
PA120.3 - (old model w/25 mm fan spacing) 430 x 128 x 61 mm
I can't find whether TC changed the rad size on the PA120.3 when they went over to the standard 15 mm fan spacing this year. You might try asking a vendor such as Jab-tech and see if they have the measurements for the new ones or if they could measure it for you if you want to go with the 120.3