i have had 3 babies over nine pounds...two at 9.5, and one at 9.8 the 9.8 lb was born in water and was my easiest birth...he was also my 5th baby, so that might've had something to do with it
one of my 9.5 was posterior but delivered fine and without tears. my 8.13 dd was my hardest (second baby) because she was transverse and my midwife pulled her head into position...i went from 4cm to pushing in about 30 seconds and it was the most excruciating pain i have ever felt...but also natural and without tears.
i think a good midwife and a mama's own positive attitude go a long way when it comes to birthing. i also think atmosphere has heaps to do with how a birth goes...mine were homebirths because i would not have been comfortable at a hospital...plus 4 of my babies would have ended up 'emergency' c-sections due to size and/or position or duration of labor (my surrobaby was a 72 hour labor). it all has to do with your comfort level, and each woman has to decide that for herself.
so for the OP, i hope you have been reassured by all these wonderful birth tales! you can do it.