Bazz,
A lot of serious togs around about my area use
Keynsham Photographic. Their Fuji Frontier Printing is excellent and very cheap at larger sizes. They will give you 8 8x6 prints (IIRC) as a trial for free. If you monitor is not calibrated then look at downloading their Frontier profiles for your workflow to get spot -on results 'monitor to print'
IIRC it's a 48hr turn around but if you have a prob or a rush job then they are only in Keynsham
Dave B.