Finally bit the bullet and bought myself an eka swingblade (in bright orange so I dont lose it!)
Ordered it Friday afternoon from blade tech and it arrived Saturday morning great service and a great price (£59 delivered).
It seems a pretty decent bit of kit, it's sharp, has a good sheath with it that clips to the belt and it is lightweight for carrying about. Blade is not to long either at just under 10cm.
Without wanting to sound too daft, I take it a curved blade can be sharpened in exactly the same way as a straight blade without damaging it in any way?