super motards for first timers

[ronin_01r1]

what's a good first super motard for the street, and maybe a trackday or two. 90% street use, 10% track. i have no dirt bike experience, only street bikes (5-6 yrs), about 5 trackdays per year the last 2 years. i don't plan to use it as a dual sport at all. i want something that is low maintenance, similar to most sportbikes. i'd like to get something used to start.

i was thinking of the suzuki drz400, but have heard it's a little low on power and the suspension could use a little help, and that most ppl would tire of it quickly. i'm not sure if this reasoning is similar to the "600cc is not good for beginners, get a liter bike" rationale.

some have suggested a ktm 690, ktm 640, ktm smc 625. but i don't know the pro's, con's, and differences between these models.