It's been 6 weeks waiting from NCIX.CA for a Black Ice SR1-280 Silent Revision 1 Dual 280mm on back-order. I phoned NCIX and e-mailed HardWare Labs that make the product a week ago inquiring as to a date when the product would be available and have received no conclusive answer; so, I ordered a Coolgate CG280 - Radiator from FrozenCPU and in the process of cancelling the NCIX order.
Gotta say that Coolgate CG280 looks like a great product 3 Core, 7 FPI, Optional inlet/outlet and has a drain plug plus has the STD 15mm Fan spacing which means I don't have to fabricate to install it into the front of my Fractal ARC Midi R2. Only have to drill a hole in the bottom of the ARC Midi Case to drain the system ;o)
For a 280 x 60mm Rad the 3 Core/7 FPI Coolgate CG280 looks ideal for 140mm lower pressure fans and Quiet Operation (Italian) - $82.99 US.
Specifications:
15mm Fan Spacing ;o)
Weight: 1360 g
Liquid Volume: 481 ml
Pressure Tested: 1.5 Bar
Dimensions: 332 x 142 x 60 mm
7 FPI (Fin per Inch):
Material: Copper Fins, Brass Chambers
Screw Thread Length: 6.0mm 30mm
Apparently for a few dollars more you can get these with a Copper Plated finish.
Has more options then the Korean made 2 Core Black Ice SR1-280 priced at $114.95 US.
NOTE: Has the Corsair 20mm Fan Spacing and 9 FPI fins - Known for Quality & Finish - Practicably Unobtainable here in Canada.
The EK-CoolStream RAD XTC (280) also appears to be a descent 280 x 60mm rad for $84.99 US
Reliable older 2 Core design with 10 FPI fins requiring Higher RPM/Hi-Pressure Fans. Probably more suited for 120mm Fans. I believe it has the STD 15mm fan spacing.
To review my loop it consists of a Ref Gigabyte R9 290X / XSPC Razor R9 290X waterblock with backplate / Koolance RP 401x2 reservoir with one 400-PMP / Coolgate CG 280mm Rad / 2 x's Noctua NF-A14 PWM - Lots of room to expand into a 2 or perhaps a 3 loop system if I keep the Corsair H110 AIO on my i7 2700k.
Patience - Patience ;o)
PS: I see Aquacomputer Kryographics is making a nice Water block for the Hawaii Radeon R9 290X.