Suzuki 1000 V-Strom - youre a tall and big guy. Cut your teeth on a V-strom until you have shifting and cornering and breaking and pulling in the clutch at speed, and letting it back out at speed, - all becoming second nature.
Then, you will want to and be ready to harness the power of a machine like the ones you have been looking at. The riding positiion for a newbie is quit a challenging thing if you are still working out the kinks of traffic and motorcycle operation.
The V-strom sits you up in a more normal manner and allows you to get all that other stuff to where you dont have to think about it anymore, and then you should be ready to lean over and have fun.
ZZR-1200 also sits comfortably, and is for a big fella, - its faster than most bikes also...but it is easier on the throttle, unlike the busa, which is the most torquey bike I ever felt. The busa does not allow for error on its throttle.
Fast bikes like the zx11, and even the zx12 allowed for a sloppy throttle...the zzr1200 allows for it as well as the CBR1100xx, - but the busa will bite you like a great white if you screw up on its throttle.
As for you friends telling you that your strength will help you with a big bike, - thats complete crap. Ok, it will allow you to pick it up off the ground, or make it easier for you to manever when its not running, - but I dont care how much you weigh, - just about any bike has enough power to make you feel like a slave to the bike's direction if you are in gear and the engine is running.
What I mean is, - when the bikes moving, - your strength is a non-issue...it takes little more than the thought of leaning over and the bike leans over when its in motion...so dont think you have to buy a big bike because you are strong. A big bike is good to carry a big guy, - but a "fast" or Torquey bike is dangerous in the hands of a newbie. Big or small.
The V-strom might be torqey too since its a V-twin, - but I believe the bike has quite a better suspension and sits high, which is why I thought of it for a guy like you.
The busa is kind of low for a tall and big guy, and you might look wierd on it, - how does it feel? - Dont the footpegs on the busa seem to close to a tall guy?