Welcome. I'm only relatively new here as well.
The November Expo will be a great place to try lots of different games and meet some like minded people. At the end of the day the best game is going to be the one you like the most.
In the meantime, the PINSIDE.com website and Internet Pinball Database have a Top 100 / Top 300 which collate ratings and comments from other players who either own or have played games. Most of the top 20 games are getting pretty pricey, but there are plenty of great games ranked lower than that. I found this article pretty good:
http://gameroomblog.com/guides/the-top-ten-best-bargains-in-pinball-today
These are not "a" titles but are mostly really good games at reasonable prices. Though these titles are becoming more expensive as people realise they are actually good games. Usually it's the theme that holds them back - but the gameplay is good.
To get an idea of prices try pinpedia.com and look only at the auctions that actually had bids on them, not the buy it now ones. Just remember pins in the US are significantly cheaper than here (30% ?) or ask around on this forum once you find one you like.
If you have time the podcasts are good to get info, but you have to be really into it to listen to an hour of pinball talk. The local Pinheadz podcast is great, and Coast2Coast and The Pinball Podcast from the US are also worth a listen.
Around Sydney, the 2 best destinations I've found are the Courthouse Hotel in Newtown and Pinball HQ at the Coogee Diggers (they have a club u can join as we'll). There's a pub in Newcastle that looks good and Pizza and Pinball in Newcastle as well.
Just remember that most games in the top 100 of any list are still going to be really fun. It's all pinball and one pin ranked 74 is far better than none.
Enjoy.
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