Setting aside my initial remarks suggesting anything but a liter bike as your first. (a 600cc sportbike would be the largest I'd suggest as your first, assuming you have previous riding experience. Otherwise a 400cc or smaller would be more realistic if you've never riden before.)
Honestly I would discourage ANYONE from buying a brand new sportbike. The value will drop at least 1/3 once you roll it off the showroom floor. With the exception of the BMW. So based on that, I'd get the BMW.
Now when it comes to buying a used sportbike you have to be carefull. Since there are way too many sold to street squids that don't know or care a damn about regular maintenance. You know road hard put away wet.
So if your going to buy a used sportbike.. buy one from a racer. A competative one if possible.
Why a race bike you ask? Quite simply this. Modern sport bikes are designed to be riden hard, as long as it is maintained.
A competative racer will have broken the motor in properly and done basic maintenance if not meticulous. You can also pick up a bike with thousands of dollars worth of aftermarket parts (aftermarket exhaust, shock modifications, brakepads, frame sliders, etc)
You can often find them with boxes of spares. I'd suggest checking the classifieds in the back of an issue of
http://www.roadracingworld.com/Oh and did I mention the price of said bike will often be much less than new. And impossible to recreate with all the upgrades by purchasing new and buying all the goodies.
Attend a race at the nearest track in your area.
You also have the advantage of having a bike that is prepped for the track. What a great way to get a feel for your bike and learn to truly ride than do a track day or two before ever setting rubber on your local streets.
Now the downside.
You could easily get hooked on track riding and that will end up costing you all your free time and extra cash from that day forward
Much like going to the range for the first time
As far as the R1 being popular.. yes it is popular among the squids. But it is a solid bike as well.
That being said there really isn't a single bike being made now that isn't state of the art and ultra reliable.
God bless racing innovations.