Most newer monitors that arent the dirt cheap versions will be HDCP. If the monitor itself has an hdmi input you can almost guarantee itll be hdcp. Same if it is listed as "1080p" resolution its most likely hdcp. of course best way if its not listed at the store is to go home and look it up, or have the sales associate look it up for ya.
As for audio.....the way i do it with my pc monitor is to just use the stereo (red,white,yellow) cable and set it in the ps3 options to output audio via component and use my computer speakers for audio. You will need a 2 female end to 1 adapter then dpending if you can find it the 1 end will need to be female so you might end up with a male end and just have to buy a female to female adapter to go on it. Really easy and costs maybe 10 total (if that)