I don't know if you have been a rider in the past, but I can tell you from experience, that in the long run you will prefer the tank. I ride a triumph mostly because I think the extra you pay for a Harley isn't worth it. But you will be spending probably 16-20k on a decent non-customized Harley. Imagine what you could do with that cash on a fish tank. Plus now you have insurance and other accessories that you would buy just like you would a fish tank so there are no savings on maintenance either.
And most importantly, something somewhere will make you wish you didn't have that bike. Don't get me wrong, I love to ride. I am right at the Blue Ridge Mountains in VA and it is a great place to ride. But.....in the winter, a bike sucks. The payments......a bike sucks. Believe it or not, in weather like the last couple days, the bike is too hot!!
Finally, even though I have never laid mine down yet (knock on wood), almost everyone who rides for anytime at all does sooner or later. I just hope that when I do, it is one of those embarrassing "drop your bike at a stoplight", or worse yet like a friend of mine, "drop it in line getting fast food when he slipped on an oil spot".
If you do buy, drive safe and watch out for all those idiots in BIG CARS who don't care about bikers.
If you can't tell, I am considering giving my bike up soon. I figure the day I am told I will be a father is the day that bike has a for sale sign on it.
