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Personally, I'd just try your 32mm eyepiece for low power, and a 10mm eyepiece for a 2mm exit pupil - this shows up the other two Messier galaxies next to Andromeda quite well at a darkish site. Though your 9mm would do the job too.
The thing is, what you really need is an ultra dark site. I used to get really annoyed reading US astronomy magazines where telescope reviewers at ultra dark sites were seeing all 2 degrees of Andromeda with 100mm telescopes. I've only ever seen the core of the galaxy from down here, and I think there is no hope of getting a better view from our peninsula because of the lights from Melbourne.
Still, I check it out quite often when it's up in the sky using my binoculars - because it's still fascinating.
Regards,
Renato
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