I generally don't like to ppost in a ladies form b/c some women get all pissy and get thier panties in a bunch but maybe my decisions may help you decide on what to do..
first thing i am going to say is Dont ask other what you should ride... ask your self, research the bikes you interested in, try and test ride them or take a friends for a spin around th block, sit on a bunch as well.. see what fits you and feels confortable. Read all you can and learn as much as you can before making a decision.
Me being male i have to totally agree with the male testosterone thing... when i was looking for a bike every guy friend was like "Get the 1000 and get it over with" blah blah blah... But just b/c your female does not mean you should not get a 1k either, women tend to respect the power more then men and women tend to be less reckless as well..
Personally, i think a 1k is way more power then i need or can even use but maybe in the future i'll change my mind (you know us men)..
I know women dont think like men do but here is what helped me decide on a 750 over a 600
It was a great article!! I have ridden various 600/636 and was quite comfortable with the power especially since i never owned a bike before. There was always 1 thing that stuck in my head, everyone i have talked to said that after a year on a 600 they wished they had bought a bigger bike, yes all male, and that was the one thing i didnt want. I didnt want to regret buying a 600 and wanting more (testosterone thing again).
When comparing the 600-750 nearly all specs were the same except for the motor... i can truely attest to the fact that the 750 was the best choice i made.
It rides like a 600, feels comfortable and just as ninble but it has more power. I am not saying its huge difference like 600 to 1000 but the added torque over the 600 makes it really nice to ride on the street, it has the power to pull comfortably in any gear even at 3k rpm. normally on the street my r's are between 3-6k, i usually shift around 6k. But when i feel like gettin on it the 750 hauls ass like a raped ape... the power is there when i want it...
On the 600 i felt the need to downshift if r's dropped to around 3k, it just didnt have the torque to pick up speed, it felt like it was laboring a bit, the 750 does not struggle at all.. Im not going to tell you that its a huge power difference but it is noticable, especially low and mid rpm, on top its not so noticable. On the same note, my bro's 1k pulls damn hard from 3k and the power difference is huge...
When i was in the dealership to buy my bike the dealer was trying to convince me to get a 600, he said you can make mods to the 600 to make it faster then a 750. I was like, well anything you can do to a 600 you can do to a 750 and why whould i want to buy a 600 and put $2000 into making it as fast as a 750 when i can just buy a 750?? From car racing i know that there is no replacemt for displacement. If the 750 becomes "not fast enough" i can do mods to it to make it faster.. but again im looking at it from a male perspective. most of my female friends are more concerned with how pretty thier bike looks and and sweet it sounds. yes they care about the performance but not as much as the men do..
my advice is:
1. try and ride both and see which one you feel more comfortabel with
2. know your personality, if you're the type of person who tends to want more once you get used to something then go for the 750
The 750 is not all that much faster then the 600, i feel its more streetable and has more useful power w/o having to ring its neck or rev the shit out of it to get it to move. You can always twist the wrist less but you can't always twist it more....
most of the time im tooling around in 6th gear at 50mph or so, rpm is generally low, 3-4k but if i wanna pass someone or just speed up, i roll on the trottle and she she moves effortlessly (no i dont mean like a rocket off a launchpad), she comfortable and smoothly accellerates, i dont need to downshift... but if i do drop a few gear.. damn she pulls nicely... also, neither the 750 or the 600 is wheelie prone.. im 130lbs and my 750 does not come up easy on me, will it lift? yes , of course it will but not w/o me doing something dumb like snapping the throttle in 1st at 8k or shifting hard to 2nd while staying on the throttle..
hope this helped a little