If you're looking for a 510 kit with pre-filled cartos, you're limiting yourself drastically.  There are few if any "good" 510 cig lookalike kits.  The Joye 510 is about as good as it gets for a 510 sized battery, which still isn't saying a lot.  If your kit must come with pre-filled cartos, you'll be limited to a limited assortment of crap.  
Virtually all of the good cig lookalike kits come with either an 808, 901 or a proprietary connector.  They come with cartos because they want you to 
buy their refill cartos.  So, they often use proprietary connectors.
If you really, absolutely must have a 510 connection in a cig lookalike, my suggestion is to get a Joye 510 and 
buy the cartos separately.  It still won't look much like a cigarette though.