As a media centre, the PS3 is excellent, but it's a poor upconverter. If part of your scenario includes watching standard DVD's, many stand-alone BD players will be vastly superior to the PS3.
Also, many .mkv files do not play on a PS3 and need to be converted to a different container such as .m2ts. As well, PS3 cannot properly handle a .mkv file with multi-channel DTS. You need to trick the PS3 into playing it and the resulting file will not be playable on any other device.
In other words, sort out your exact needs before deciding. It's unlikely that a single player will meet all your requirements so you'll have to figure out the relative importance of each.
As for Netflix, take a very good look at their selection before deciding that it's a make or break item for your BD player purchase. I found their selection to be pathetic. I realize it depends on taste and that others have a different view. I wouldn't use Netflix if it $1.99/month, others think it's a great deal at $8.99. Take a good look at content and assess its value to you before deciding that it's a must have for a BD player. It very well might be, but make the assessment based on your own research into what Netflix actually offers.