John,
Did you ever decide to go with these tires? I am starting the research phase of getting rear tires for my roadster (stupid fronts just keep on going) and am torn between these and the PS2's that you also mention. Cost difference is almost double for the PS2's over the Invo's ($228.39ea vs $440.00ea). I don't want to overpay, but I don't want to buy tires I wont be happy with. Coming from BFG gForce T/A KDW 2's I have a better idea what areas I want performance improvements in. Not that I dislike the BFG's, but they have certain drawbacks that limit my driving style/areas.

Thanks in advance
Ben