I agree that the CBR500R isn't exactly a SS, but I think it fills a gap quite well. It's a good intermediate between the "learners" 250R and an SS. If your destination is a SS, then going to the 500R from the 250R is probably a waste of money.
However, and this is a big however, if one plans to keep it a fair while, its a longer term investment. I see the CBR500R as a good step up from my "learner" present state: it is (likely to have at ~50hp) about 60% better power to weight ratio compared to the CBR250R. Yeah it's still a "LAMS" bike, but a significant step up from the 250R.
This appeals to me as I can easily see myself wanting a bit more oomph and a bit bigger bike, and being able to use it in a controlled fashion. I do like to have some decent fuel economy as well, and not pay through the nose for the bike. I'm not interested in a second-hand bike, cars always, bikes no.
I do hope it has better/better set up front shocks than the CBR250R though, and wish they had stuck with the fantastic dash of the 250R - that digital look with no temp gauge was a big mistake IMHO. I would have preferred that they kept the weight down a touch, maybe 180-185kg? The 250R is 165kg for goodness sake. I only go a buck 160 suited up. I'm wondering where the 194 kg came from too - maybe Aufitt was right, they filled the fairings with lead to keep the power to weight down

. Well, at least that gives me an easy first mod

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Had the CBR500R been available 5 months ago (when I got my license), I might have seen how far I could push my wife ;-) knowing that this would save a second bout of negotiations a few years down the track...which I might loose LOL.
While I think a 600SS would be "fun" I also see it as a bit OTT for me as it has tooooo much oooomph soooooo very temptingly available on the street. Also my back doesn't fancy the 40+ degree lean angle when I sit on a SS....I really just ride for pleasure :-) Ditto my bank account re the $ for a 600 ;-)
Yes I know the Ninja 650 is much more upright than other 600's, and more "sedate", but its way more expensive than the CBR500R is going to be. I still live in hope that in a few years, when and if the chief financial controller in my home green lights it, the 500R will have a better dash. You will hear the cheers of joy wherever you live

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My 2c
Dave