I'm 6'3" and have an X19H, moved to from a 1007 pup. The bunk is maybe 1" shorter, but still a good fit. I sleep in the outboard position and my feet occasionally get "hung up" on the bunk suspension cable, but I fit well enough.
I would avoid the new Jay Feather 7 models that are only 7' wide; those bunks don't work for tall people. Stick to the classic full wide models. I do find the mattress in ours to be a little thicker and more comfortable than the pup mattress; I used to bottom out on that one.
2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2012 Chev Traverse LT with TP