Borescope - recommendations

[ciaranthemurph]

Not quite home mechanics, but mechanicing none the less. Can anyone recommend me a good high quality borescope. I'm working on a large diesel engine (4MW) and have removed the injectors. Our maintenance program calls for us to use a borescope to inspect the valves and liners and the one we have is completely duff. Can anyone recommend a good quality borescope, preferably that we can get still photographs from if possible and I'll try and order one for my work.

I've used a snap-on one before, but you could not manipulate the head to look in different directions, but apart from that it was quite good.

Any help would be appreciated.