Duek, if you are scorching your cartos and juice at 6v then you are definitely not getting the best vape experience. Before I got my first Buzz (a little over a year ago) I was using a mod that would give me 3.7 or 6v depending on what batteries I used. 3.7 was too wimpy, 6v was way too hot for me...and my cartos. I was and still do use good old Boge 3.0 as well as the Fusions.
When I got my original Buzz I couldn't believe the difference being able to set my voltage made! My personal preference is between 4.2 to 4.6ish, depending on what flavor I'm vaping. My cartos last longer, I can taste the true flavor of my juices and I can easily bump it up or down a notch. I have a Liquinator and one of Notcigs M1A1 tanks and love them both. My M1A1 has the fill port and screw, which makes refilling quick and easy with a syringe.
Now I have my original Buzz, original Infinity and 2 BuzzPros