Good eve' =)
Allow me to throw my 2cents worth of advice ^.^ My main is a 75 bst, and although I can't solo the super high zones, I can hold my own in the Steppes and Sunderrock... Beastlords were given a fantastic spell called, Promised Mending, a lvl 73 spell which allows you to CH your pet. So, in terms of soloing, if the mob is to nasty for you to tank, allow your pet to step in and you play healer, dot, nuke, etc. When it comes to DPS, Bsts are just about up there with wiz's. Of course, when it comes to soloing, Necros are one of the best....so either one the SK or BST will be a different class all together.
IMO, the SK is mainly ment for oober tanking. They are great for pulling and tanking, however, I am not too sure about their solo abilities. I was able to solo with my SK in her 50's.. but any higher than that, unless you have oober gear, it would be rather difficult.
GL with your choice =) And if you need any bsty advice, feel free to send me a msg.