1C and 1D on a 319 are not for tall folks!
Recently got stuck in 1D with my 500 miles certs on a SEA-DEN trip on a mainline 319. I was VERY cramped. I'm 6 3 and I would have been more comfortable in E-!
If I ever get "upgrded" to 1C or 1D again, I'll ask to be downgraded back to coach.