Sorry guys,
Should have been more clearer... 
Ok I bought the Alphacool kit as I knew nothing about watercooling but then a month or so after I realised that there was nothing too a water cooling setup and began replacing piece after piece after my pump and resevoir that came with the kit broke and the silly bracket you use to hold the cpu block in place was again stupid and fidley so I basically replaced everything apart from the rad and 3 120mm fans (thats all thats left of my original aplpha cool kit)
My setup now comprises as follows:-
Pump:        12V Laing DDC1+ Ultra 18W
Reservoir:   Laing DDC Top/w Reservoir (XSPC)
CPU:          XSPC Edge Acrylic CPU Waterblock
Hose 3/8"
Fesser UV Liquid cooling
Now previously I had a 4870x2 included on this loop with an EK full cover waterblock and both my cpu and gpu temps were fine (around 45c)
But since then my card became defective and got a refund and have now purchase 2x HD4890 ASUS Voltage Tweak model and have now purchased 2 EK Full waterblocks and am going to add this to the same loop and I feel it should be ok temp wise as it handled a 4870x2 but while I was draining the system etc to fit these cards was wondering is it time to replace my last part of my old kit if you like.
Now I dont know what metal it is and I cant remember if there was any obvious labels to tell me anything about the rad or fans so hence why I am asking is there a better solution ??
Thanks for yur feedback guys and hope you can supply more now that I have given more information (Which I should have suppied in the first place )
Eagerly awaiting your feedback so I can order stuff if required asap