I was about to echo Fast's caution re the pullman. The Womboat's forward berth is about the same proportions as yours. I would have liked to rebuild it to a pullman but when I laid it out in situ there was no way it was going to work unless we raised the sleeping platform by around 12" which so reduced the headroom as to make it impractical.
That said I agree wholeheartedly with wanting to get away from a v-berth. I am finding that as the old joints start to seize up that doing the v-berth shuffle is becoming somewhat difficult.
“Give a man a fire and he's warm for a day, but set fire to him and he's warm for the rest of his life.” Terry Pratchett