The mounts from what I heard are not too hard to come by. Someone in beta will probably give you a full description of how you go about it. I dont want to say something right now and turn out to be completely wrong. Not worth the flame even though flames are not allowed in these forums. Thanks to Kudane and that other admin guy
jk Dolby
As for Necros... on opening beta I heard that the differences between the summoning classes were extremely slim but now they're starting to show their colors and they're starting to gap. I hear both are lots of fun depending on your style. Go with what equals fun for you!