I've been blasting my 510 for almost 2 months and today the passthrough finally died so I had to return to my old 801 passthrough - the taste is night and day but I know that when I get a new batt for my 510 pt I'll be jumping back on it for some reason. It's like I love the taste but the throat hit on the 510 satisfies me more than the smoother hit of the 801. Which is more important for you guys?