for £400 you can do alot better then a kona fire mountain.
if you can find any, a 2006 carerra fury is 400 quid, reduced from 500 (from halfords, yes, i work there) is a much better bike then the kona at the same price (we also sell the kona)
link
Carrera Fury 06
alternatly a GT/giant/specialised/trek around the 400 mark will most likley have better kit on it then that kona. having worked on kona's for a number of years now i cant help but think that your simply paying for a brand name, value for money is very low on sub £1500 kona bikes.