Those are all sexy bikes. I think it all depends on what you plan on doing on your next bike. I think the FZ1, V-strom, Bandit and ZRX are all sexy bikes. That and they are all capable of both running around town and touring. The KLR is a much more industrial bike but I know a guy who rides the hell outta his. He has nearly 20k on a 2 year old bike... he's ridden it from Conneticut to Deals Gap and back.
Personally, I'd say, "go with the FZ1". Everybody I've talked to says it's a superior bike and does most everything well. Next up would be the V-strom to satisfy my need for crossing that mountain and not using the main road.