There is only one place I know of in Aus to buy Creed - Harrolds Menswear in Syd and Mel. They have a limited range (GIT, Tab Mill, Himalaya, a few others) and are at RRP (>$200 for a 125mL).
You'd probably be better off buying it from a reputable e-tailor - many can be had for A$100 / US $80 for a big 125mL bottle. My favourite male Creeds would be BdP, GIT, Tabarome Millesime and Vintage Tabarome. Unfortunately only GIT and TM (along with Himalaya, Original Vetiver, Santal and a few others) are available cheap on the net. There are some ebay retailers that ship to Australia and are quite reliable - Fragrance Express is one I have used. If you search Creed on US ebay, just look for one of the big stores that has thousands of positive recommendations and you should be fine.
If you'd like more detailed description of any frag, try the reviews in the directory - they are indespensible.
BdP is my favourite Creed - a creamy spicy wood which is described here as very formal, but because of it's smoothness, I think it has a sexy quality and can be worn semi-formally / socially also. BdP is VERY hard to get on the net or in Aus.
Epicea I have never smelt but is apparently pine based
Efolfa is a nice aquatic, good quality, but if you are spending a lot on Creed, I'd go for something which is distinctly "expensive" and unique
Personally I was disappointed with the women's Creeds when I smelt them all on a trip to USA. Both of the ones you mention smelled to me like many other designer frags - they seemed to have some cheap fruity qualities. I did not analyse them in depth, but I was shopping for my wife and I do take a keen interest in her perfumes. I'd prefer Malle or Lutens for gorgeous, unique, high quality female frags (especially the florals!)