Here are some of the things I have decided thanks to all your input.  

I'm going to get my Sling Blade looked at as far as comfort and try to start throwing it again, see what I can do with it now.

I'll do the same with my Apex Addiction and see if I can get comfortable with that as well.

I MAY get my red hammer plugged and redrilled to try on dry conditions.

I will also keep throwing my Ebonite Vortex I and look into modifying the surface from time to time.  This will be new to me, but I'm ready to give sanding/polishing a try for different reactions.

I plan to buy a brand new ball, but I'm waiting for a couple things.  One, I will talk to my coach (who also runs a nice pro shop) what he recommends for me.  I'm also going to wait to see what I'm missing if I get this current set up of balls working for me.  I probably want something "all around" but more aggressive than the Vortex.  Some that I've been considering are the High Rev, Original Inferno, V2 Sanded, and others.  Thanks again for the help!  At the very least it made me take another, closer look at the equipment I have now.