So I had the Vulcan 900 Classic LT for a little over a year and just sold it. It was a great bike!
Now I'm looking for something used, a little sportier, under $5000, V-Twin.
Useful answers to your question depend totally on what "a little sportier" really means to you: what specifics attributes are you looking for in your next bike, how will you use/ride it, are you looking for bigger/smaller motor, etc, etc, etc...
Surprised nobody mentioned the most obvious choice- a Vulcan 900 Custom. It is certainly "a little sportier" than the Classics/LTs, exactly how much sportier would be a matter of opinion... or, in the dual-sport/sport touring direction, have you looked at the Suzook V-Stroms, the big 1000 and 650 "Wee-Strom"? They are great bikes, and you can probably find good used examples for <$5K if you shop around. Or, for "something completely different", you could look at a H-D V-Rod, it's definitely "a little sportier" than a Vulcan Classic... it's the only Harley w/ 4-valve heads (motor designed by Porsche) and modern suspension technology, although you'd probably have a VERY hard time finding a used one for < 5 large...
Clearly define your criteria, then shop the market to find what bikes match your needs & wants ... for bike technical reference info, Total Motorcycle is an excellent resource-
Not a cruiser, but definitely a V-Twin--consider a Suzuki VStrom, either the 650 or the 1000. Plenty of spunk and the handling is very sporty. I love my 650 and have no desire to have the 1000, although it has more torque and a bit higher top end. The only downside is the seat and stock windshield, both of which are easily replace with something you can live with and love. The engine is a 90 degree VTwin arrangement, also known as an L-Twin. That is, if you would consider something other than a classic styled cruiser.
"Don't sweat the small stuff---it's all small stuff"
Has no one mentioned the MT-01? Is it not available where you are? I guess it might be out of your price range, but if you can find one I'd give it serious consideration. I had a test ride on one a year or so ago and it was one of the best half hours I've had on a bike. An air-cooled, pushrod 1670cc V-twin in a brilliant naked sportbike chassis ... sound ridiculous but it works beautifully.
I personally love the Triumph Thruxton... Cafe Racer style bike...
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2008 Vulcan 900 Custom
V & H Slash Cut Staggered
ISO Grips, Pegs, Stiletto End Caps
Irate Customs Radiator and Regulator Grill
Kuryakyn Bullet Tail Lights
Clear Tail Lense
Swing Arm Bag
Front Tool Bag
Clear Turn Signals
Cobra Headlight Visor
Avon 230/60 15 Roadrunner
LA Choppers Lowering Kit
I double that on the yamaha MT-01, its not a high revving motor but it is a sports bike chassis with a thumping big v twin motor with a lot of torque, its looks are a bit out there but a hell of a lot of fun and sounds incredible