1990 H.D. Sportster

I have just a kinda general question here about size of bike....I've wanted to get another bike and if I ever win the lottery....but, with me being 6' 2" and 210 lbs. what size of Harley should I look at getting...I have some back issues, but nothing that Percocets cant fix....a cruiser is what I would be thinking, but what size?? I have experience on bikes too, but not Harleys...sorry for the hijack but I figured this is where I might get some answers.

Nice bike by the way!!

Thanks
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