Digital BW, The Print

Hello all,
I'm about to print profiling charts for my new 3800 and am not sure whether to opt for Superfine or Superphoto - both colour and for ABW.

Does anyone have an opinion on this? To the naked eye, all I can see is heavier ink laydown with Superphoto. Under the loupe, there is quite a difference - but buyers will never see that with a naked eye.

I can't find a way to switch from 'Speed' to 'Quality' - what have I missed?

thanks,
Richard
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http://www.richardsmallfield.com