As some of you know I just picked up a fireplace xtrordinair 33 elite fpx insert. I am looking to pull the trigger on a liner and have really been looking at the flex king liners. Either the reg or pro model. Is the smooth wall interior worth the $75 price tag? Forgive me in advance if these are dumb questions. I am new to burning and have learned everything I know so far from you guys. Just looking for your opinion on this liner and if you don't like it, what are some well made liners? I need a 6x25 round liner. There 1ply is 290 for the insert kit and the 2ply like 365. I also want to pick up the deluxe terra cotta top plate but will get that with whatever I decide on. Will they work on pricing if I call instead of order online? Most places seems to eat the shipping but on the site they do not.