I like a simple rossette with a crystal knob.

you would want to decide what finish you would prefer, brass, bronze or a nickel / stainless steel. There are several options. The second thing you would want to consider is the type (function) , do you want a lever or a knob . Each type has a variety of styles to offer. I hope this helps

I love all emtek knobs.

Isn't this strictly preference and architectural style? For comfort, I need lever style without squared edges.