Interesting you say that, I will be tempted by a red sunstreaker if they do one, simply because of the origins of the design, being a masterpiece version of the original first diaclone toy.
I've had Sunstreaker out on the coffee table ready to transform for over a week now. all I've done is change between the super tuning mode and the normal lambo mode. It's mostly a 'I'm too tired to enjoy it' thing though than anything else.