Being that you are man sized, all of the bikes that interest you will very likely be too softly sprung for your weight and will work much better with some stiffer springs in the front and a shock upgrade in the back.
That being said and with you being fresh to the sport I would suggest something like a Kawasaki KLR 650. Big enough for your size, enough power for the freeway, front brakes that won't dump you the first time you have to panic stop and you can take it in the dirt to get a feel for what its like when you are loosing traction at either end. You will drop it a few times in the beginning, but getting a feel for bad traction now will save your bacon for the rest of your riding career.
Welcome to the club of two wheels! :beer: