Help me with my first loop

[BritishBiscuits]

Hey guys new here, looking to build my first water cooling loop and could use any and all hints and tips.
I haven't brought any parts yet and im trying to fit all this in a Corsair 450D.

my wish list so far.

EK-Supremacy EVO RED Edition
EK-FC980 GTX TF5 - Acetal+Nickel
EK-XRES 140 DDC 3.2 PWM (incl. pump)
EK-HDC Fitting 16mm G1/4 - Black Nickel

As you can see i have not decided on any rads yet as im unsure if i should be getting two or not and if so what rad to fit in the top of the case as im using a (corsair h110?) at the moment and there really isnt much more space left 3mm or so id recon.
I have seen these that i guess would work if you would pass judgement on them for me.

Koolance Radiator 2x140mm Copper (High Flow)
** No competitors please **

Alpha NexXxoS ST30 Full Copper 280mm
** No competitors please **

MagiCool Copper Radiator - 280 mm
https://www.overclockers.co.uk/showproduct.php?prodid=WC-004-MA

** Please don't ask for competitor details **

I haven't decided on any tubing yet if you could give me a few hints there too.

Thanks -Alex