I've used Clairol Creme toner and I've always been satisfied with the performance and it smells great to boot. However they have discontinued all but seven of their shades. "Champagne Beige", "Extra Light Platinum", and "White Beige" are by far my favorites. When you mix the latter two it makes a PERFECT platinum blonde. Just because it's Clairol don't knock it lol.
Wella Color Charm's line of toners are OK and come in quite a selection of colors. I've found that these do a better job of toning excess yellow than Creme Toner. It seems that with CT you have to have the hair bleached out perfectly to pale yellow and the precise porosity for it to do any good, even with the violet based beige shades.