Consider a used SV650S for same or less $.
I haven’t ridden a Hyosung, but general consensus seems to be that it is a fine bike, but suffers from build quality issues. If you get it, make sure you like the dealership you get it from (I suppose that should be said of any brand, but with Hyosung there are fewer dealers, so you can’t just take it to the other dealer across town).
Handling and brakes are “woody” and lack feel.
But I think the biggest strike against a new Hyosung is the low resale value. At least with a Suzy you know you’ll be able to sell it for a fair price when the time comes. That said, maybe you can find a good deal on a used Hyosung.
There are a lot of good bikes in that range right now:
The Hyosung, SV650, Ninja 650R, and the Duc 695/696 are nice narrow bikes. The twin engines make for a slimmer bike, while also cutting down on maintainence costs.
The FZ6R, GSXF-650, (used) Katana 600/750 and Bandit 600/650, are all great bikes as well, but because of the inline four engine have a much wider tank. None of them need to be revved like a true 600 I4s, but they do take more maintainence. They are also all heavy bikes (mostly because all of them have steel perimiter frames (cheap, plush, but heavy) where the twins have AL or trelis steel frames (stiff and light, but expensive to make).
If I were you, I’d keep the Hyosung in mind, but only as a good deal on a used one (unless sitting on it, it just feels like “your bike”).
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