As a general comment, a 600cc+ bike these days will provide you with any amount of real world fun and commuting use. The thing to think about is the weight and typical riding conditions.
I wouldn't commute on my Ducati because the steering is heavy and its a bitch at low speed. But I didn't buy it to commute - its a toy and a lifes dream.
The 1000s are seductive and insanely powerful in a world where we are restricted to 110k or 50k if you are getting to work.
Personally I think the 750 class is the ideal combination of weight and power. Mind you, a mate who is used to 1k bikes has recently bought a 650 for every day purposes and is very happy.
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