How are you doing buddy? Hope everything is good with you and the new table. Here is what I have heard from numerous people, but of course, you should go check it out yourself before spending the big bucks on the rack.
As the sardo tight rack, I have one myself, but never got to use it lol. So I can't speak much for it, but experience from others is that either they hate it or they love it. 
Delta racks, I hear a lot of people say they are the best racks out there, but IMPO, that is pretty steep for a rack. So if I decide to pay that much for it, I would really hope that the money is well spent. 
By all means, if you like the sardo, I say stick with it, but if you really want to try something new, go ahead and try a Delta. I am sure there should be plenty of guys out in the board that has used both of those racks and can give an honest opinion about them. Good luck my friend, hope all is going good.
Chino