thanks for the input nikhsub. Based on what you've said i've revised my setup and this is the final config; all on 3/8ID fittings:
MCW6000
Fusion HL V1.02
MCP350 <-- having to import this from the U.S. as not available over here. But well worth it, especially with the current exchange rate :P
MCRES-525
2x medium speed panflo 120mm's
6.5ft tygon 3/8" ID tubing
Anti-freeze
thankjs for your advice
edit/
and i decided on the 120.1 with 3/8" barbs.
edit2/
based on some sensible advice concerning fan choice and rad width, i've gone with the Black Ice Pro. Thnz nightic