I've seen a lot of videos on the Invader Mini suggested above. Saw people drive over them and crush them and it still worked. However, I know I have had experience with regulated mods that weren't durable. With that being said, I have never used the Invader Mini.
I know you hinted at regulated since you said 10-20 watts, but a Reo with an RM2 would be good for an MTL style of vaping. I have the RM2 but it's not my preference. I've confident enough with the abuse my Reo has taken, that I can still throw it off a 5 story building and let it be run over and it would still work after I go pick it up. The battery would need replacing before the mod.
This takes extra knowledge or studying if you haven't used a mechanical mod though. For what it's worth, the one company overall I will not use again because of their crap quality would be Joyetech. I was lucky to get 2 weeks out of their mods and that's not even with dropping them. They just failed and their warranty is worthless.