Why not just drop the ripped DVD's into iTunes and turn on home sharing? That's what I did, with total of about 1200 of them on a Mini that I use as a server. You need to rip them into a format supported by iTunes of course, which can easily be done with Handbrake (free open source software).
Aside from that, I also like VLC. But depending on the format of your DVD's, you might get some dropped frames. I have seen this when using airplay with VLC.