By Ella I assume you mean Ella Fitzgerald. She is much better than gawd awful Krall and Barber (I'd rather listen to fingernails on a blackboard than those two), but I wouldn't buy or listen to her. I've never heard of Sarah or Keely.
Krall & Barber don't make it with me either at all. Never!
By Sarah, I meant Sarah Vaughn. I prefer a little blues in my vocals, seems more natural. Like Billy Holiday etc., but I'm not into vocals much anyways.
Yes, I enjoyed revisiting the James Gang lp again, very nice!