After my rogue hits 60 (alt suggestions)

[Evia]

So my main is 59 and a few yellows from 60. I have been contemplating an alt to get into once I ding and wanted some input.

First of all I'll probably app rogue to a raiding guild once I ding. So I'll still mostly be focusing on my main but when I'm not doing that I wanted to create my first real alt. I'm not sure what class though. I want it to be a different role than rogue so I can mix up play styles. Some classes im considering;

Iksar Shadow Knight - I'd be able to tank which is different from rogue but with CoS and FD the mobility of the class would still be good (something I've grown to like playing rogue ) plus I get greenmist quest available to me. The con I see is that iksar and sk spells don't really thrill me. Outside of being a tank with the ability to get around the class kinda seems bland to me.

Gnome or Human Magician - The role of this class is kinda similar to rogue in that its a dps class but it's not melee and some of the utility looks fun. I also love pet classes but am burnt out on enchanter (played one on live for years) plus the magician epic quest looks fun. I'm just worried I may get bored with the class but its solo ability looks good for an alt class. They also don't seem as popular as some of the other robed classes and that has slight appeal. No root spell is a huge down to me though.

The main thing is I want the new alt to be different enough from my main but still be enjoyable to play solo if I need. Am I missing a class that could fit the profile? Any suggestions are welcome.