John Bambury is the man (ausastronomer)
Two recent threads
http://www.iceinspace.com.au/forum/s...ead.php?t=8022
http://www.iceinspace.com.au/forum/s...ead.php?t=7380
I would take a lot of notice of any of his suggestions, but try and get along to a viewing session and try for yourself.
What brand are the current eyepieces you have? Do you have a budget??