Thank you everyone for your input, everyone.
The general feeling seems to be;
FCX – not worth learning beyond basic functionality.
Avid Media Comp – not the simplest of the bunch, but widely used.
Adobe Prem – Great, but not currently used widely in the professional world.
FCP7 – 1 or 2 years before redundent
I think I’ll get to grips with the basics of Adobe, get my head round the trickier side of Avid, but ultimatly continue editing on FCP7 until I get laughed at (or preferable just before then)