Quikbooks is set up for a more basic business and costs less from my past efforts years n years ago.

MYOB tends to be sooo much more expensive but it does offer FULL packages for far bigger businesses.

See what sort of deal you can get on the software at JB Hi Fi or say the Good Guys. I never buy software off the net. Pirated n not the real deal. With a walk in purchase you can always take it back if u don't like it or if its not working correctly.
I would go for Quick Books. It is a lot easier to use. I used it many many yeears ago n it was idiot proof back then before I was trading too much and had to use an accountant full time.