These are really cool, i've used DA vetran models for my sorcerors as well though mine don't float and are the old metal models. I've never liked the whole "we're egyptian based" thing the TS boxes have going. I really like the colours, it's nice to see some vibrant csm's most seem to be very dark and moody. I'd agree that you should probabley change their name...i don't think you can get away with claiming a colourscheme this unique belongs to an existing army.
Maybe something like tyhe Brotherhood of Change or some such.
Oh btw zombie hands make awesome spellcaster hands as they are usually grasping/casting.