Can I just buy a reader like this:
http://www.tigerdirect.ca/applications/sea...zTCjCVqHCjCdwwp
Then rip my collection to my external hdd for use with my JB ps3?
Or do I have to use the ps3 for ripping?

well since as its a BDrom drive....it might work...just ensure you get the two folders plus the SFB file from the game and put all together in a folder that have the game's identity number so it can launch with your backup loader

Yeah...just look at this:
http://wonkabar.org/2010/02/16/ripping-blu...indows-and-ps3/

This:
http://www.slysoft.com/en/anydvdhd.html

And this:
http://www.makemkv.com/

Seems very possible to me.

No, it won't work. You have to use the PS3.

Guess it's just like the xbox 1....you need to rip it with the console