I suppose that depends on how wide you're willing to cast your net. If you're speaking of cruisers maybe the Honda Rebel 500 or CTX700, or Yamaha Bolt. If you're willing to consider other bikes there's naked bikes like the MT-07 or SV650. You could go more adventure with the V-Strom or CB500x. If you're looking for a cruiser that's a bit sporty, the Vulcan S seems like a good fit.