Seeing that you prefer the Ubersonic and the Vapor, I assume you like light weighted kicks rather than heavy ones. That might be a factor why you disliked the GR8. Don't get me wrong, I am not defending the GR8. As a matter of fact I have never tried them.
I can afford the Ubersoincs and Vapors, and they are great options, however, I cannot afford their durability.
By the way, the Asics Court FF2 is a great all-around shoe except for its price, and the fact they have a stiff upper in my opinion, and not mentioning the laces which is a common problem with all Asics(es). Otherwise, it is a great option; not very heavy weighted as the GR8, and not light weighted as the lightweight shoes, as a result you will have speed, comfort, stability and durability.