I personally enjoy my Source OrbXL, with the triple quartz coil being my favorite. I bought a 510 to ego adapter and use a 50W box mod to power it. It works very well. I also purchased the 510 enail bubbler attachment. I end up using it with the water attachment about half the time, and half the time just the straight vapor. I really like how they use the same anti-leak concept as Dr. Dabber on their glass piece. My only complaint was the taste after a while (It was my first concentrate vape, I didn't clean it very often so that definitely contributed to it). But atomizers are VERY cheap from them.
If you want any more info, send me a PM and I'll answer to the best of my knowledge, I think I also have a $20 off coupon if you're interested. I'm MUCH more versed in desktop concentrate vaporizers, but I did do a lot of research before buying mine back in May 2017.