I would avoid the ebay scope - you don't know what you are getting & it could be junk.
THe skywatcher & long perng would be good - keep in mind which one will give you an upright & correctly oriented image - the spotting scope should, with some of the telescopes you would need to purchase a different diagonal (or correct image) one.
Also bear in mind the EQ mount takes longer to setup as it is made for star tracking, and is harder to orient than the Alt/Az (which is basic up/down & left/right movement).
One last thing - your location says Melb - but you say it is really dark at night, are you pulling our leg?
