I'm still looking for an XB, so technically for me this is a "If you don't find a buell what will you get", but the gsxr750 has always been a favorite and was my goal until I looked at too many buell pictures, I love the mv brutale, but I'll never afford it. There's a couple other bikes I'd settle for(600rr, 636r), but regardless they'd all end up stripped down and turned into a japanese version of an XB. I love the MT-01, but it's way too big for me, I wish they'd make 900-1000cc version that would be practical for my 5'7 self.
I'd also love to jam a v-rod or some other twin into a good japanese frame. For some reason the sv1000 just doesn't do it for me.