I prefer utilities like TKO because you can use it for so many things. Most gimmicks are for one trick Eg, invisible deck, and magic mints. The TKO and other utilities like it are more limited by your imagination than by design. I haven't tried anything bigger than a deck of cards yet but it works for anything - cards, coins, ditching TT's, anything.
Ringmaster is impressive but a word of warning - be prepared to practice a lot! (practice is good, anyway) It is not a gimmick but straight up sleight of hand. I prefer effects like this because once you get them down pat they are more reliable than most gimmicks. I have not given it the practice it deserves and have not performed it yet. My dexterity is not what it used to be. (getting old sucks ha ha)
I do not have Coffee Break but I have some Greg Wilson stuff and I like that he uses such common props. Many of his effects takes very little set-up. Coffee Break looks pretty cool.
If you have not seen "Just the Way I Like It" you might check it out. It is a free download here at Penguin http://www.penguinmagic.com/p/1605
and is a cute coffee shop trick. Not as powerful looking as Coffee Break, but still kind of neat.
But for a good, rock solid, go to the TKO is pretty slick.