I've been selling a lot of the Drake II, and the original ADA Drake for that.
Fairly quiet, and a good flush.
CST454CEFG and CST744EL
I like the CEFIONTECT bowl finish in the Drake II very much, also that it doesn't splash.
I just used a Titan by Eljer this afternoon, and while draining the ileostomy bag, got splashed a bit in the face; doesn't happen with my Toto bowl.
You don't want to be splashed in the face, not a good thing.
A lot of reviews don't mention which toilets can be flushed while sitting, but many people do sit while flushing.
The Toto Drake and Drake II work fine for this.