Hi Cindy, welcome to the forum
Philips probably have on their site a list of supported 16X media with their current firmware. Most drive manufacturers do publish such a list on their site, try to find it.
Just a thing: when you say "doesn't recognize", what do you mean exactly?
Best printable discs is a difficult question, I'd say the safest option in your case is to go for 8x -R printables from Verbatim (mediacode MCC 02RG20) - though Benq users (your Philips is actually a rebadged Benq 1620) would probably give better advice. My own 1620 just died and I never used printable medias in it...
Ask for safe printable medias in the Benq/Philips forum.