Apologies if this topic has already been covered in another thread (I couldn't see one in a quick flick through the video/ photo section), I was just wondering if anyone out there has any recommendations for a good print shop (prefferably on-line) for printing cave photos (i.e. ones with lots of black bits and strong contrasts!)? 
I used to use a slow-but-not-too-bad cannon inkjet which has recently died, and chatting to some folks at Hidden Earth last year I got the impression that really good prints could be obtained from on-line vendors....

I use DSCL http://www.dscolourlabs.co.uk/ where you have the option for them to auto adjust your photos or choose that they will print whatever you send them (I use the second option).