Hmmm, how much is shipping to Aus? It's only $32 on Amazon here. I'm happy to order and reship. I work right next to a post office.
I just checked - Amazon doesn't ship it to Australia. (They use a third party, I assume it's related to that. I've never had trouble getting them to ship to me before, including games.) This is a shame, as I've found Amazon's shipping costs for bulky items to be pretty reasonable, but from other vendors, it adds anywhere from $30 to $50 or more. (I've just been through this sourcing a copy of Battlestar Galactica: Exodus. I could get it from Amazon for under $40 including shipping, but they put back delivery until March. Most other vendors wound up over $60 after adding their exorbitant shipping costs.
Race for the Galaxy is far more complicated than Dominion, which is pretty simple. However there are something like 25 sets of cards and you only play with 10 at a time so you can change it up for a while, especially as people get stuck in strategies. And Dominion is a far quicker game to play and would be much easier for newbies.
I wouldn't call it far more complicated (BSG is higher-complexity, and even it pales against wargames or deep Euros like Die Macher; RftG is only middling), but there is a particular kind of complication (heavy use of symbols) which some people find more congenial than others. Once the phases and symbols are grasped, though, it's quite smooth and intuitive from there. (Then you get the expansions and see what they do to it.)
It is true that Dominion improves its replayability with the 10:25 ratio. Nonetheless, it's in that context that the complaints about replayability were made. (Obviously it would've been much worse with fewer options.) Now, of course, there are several expansions available. They rate highly, so I'd guess they do a good job in keeping it fresh.
If I had both games, I suspect I'd introduce newbies to Dominion first, but I'd be moving them into RftG too once they seemed ready for it.