Um. I'm going to try to say this as nicely as I can, but the bells won't get you stronger than you are are now. They sure as hell won't make you lose strength, they will very probably help improve your mobility and your conditioning will improve drastically. Your explosiveness should improve too, which isn't going to hurt anything and your legs may very well grow a bit but I'd be shocked if you get stronger.
Don't get me wrong, I'm not hating on kettlebells at all. I trained exclusively with them for about three years, from RKC style stuff to girevoy sport. They're a great tool, and if you're just bored with the barbell they will be a cool way to train that won't cost you strength, but you are unlikely to get stronger without still hitting the barbell reasonably regularly.
For the record, we're very similar in height and weight. Our bench and press are well nigh identical, and your squat and DL are just about where mine were when I stopped kettlebell training (which was where they'd been the whole time I was kettlebell training too). Obviously, height and weight aren't the best comparators, and I'll be honest and admit I've had much better success in terms of gaining muscle and dropping fat when I moved to powerlifting (with minimal dietary change) than any kind of kettlebell training but the same may not apply to you.
Anyway, what I'm getting at is you might be better served in your goal by doing mostly kettlebell training with barbell training once a week, something like working up to a heavy triple or two in the big three and slowly increasing the weight as you go, perhaps along the lines of 2.5 kg per fortnight.
Just something to think about.