Ahk, I see what you mean. Yer getting the free services, discounts for buying your bike there and supporting your local bike store is all important. By the sounds of it your fairly set on the Demo 8 ii. Since you can't change any of the specs once you get it out of the shop make sure you get them to change over the parts you don't like. For example the people that I know with Demo's both got the tyres swapped over to Maxxis Minions in the shop. It is a very nice bike and has awesome specs. If you can get the money down a bit and it's not too heavy for you it would be tops. Also get the shop to set up the suspension for you (get the right springs etc)
Another option is (depending on your local bike shop) to see if they will pricematch the Sunday Team from
www.tbsm.com.au or at least give you a really good deal on it. Comparing the spec lists between the Sunday Team and the Demo 8 ii shows that they are about on the same level spec wise. The Demo has a higher spec like on the shock (DHX 5 - DHX 3), drivetrain (X0&X9 - X9&X7) but the Ironhorse has a slightly better spec like on the tyres, cranks, stem, bars, chainguide and also the slightly lower spec compared to the Demo is still really good whereas the lower spec on the Demo compared to the Ironhorse isn't so good. In my opinion they are both fantastic bikes and I don't think you will be disappointed with either. I prefer the Sunday just because I like the frame better and it has a solid spec throughout the bike (so you have nothing to upgrade) instead of some really good parts and some average parts like all the Specialized gear and cheaper stuff to save money on (that you will eventually want to upgrade).
One other option is that you could wait a month until the 09 bikes start to come in and get it a lot cheaper at end of season clearance sales. You could even buy an 09 bike if you really liked one.
Any way be totally 100% on what you want and at the end of the day it's your bike, your riding it so you should be the one happy with it.
EDIT: Im sure you have seen these 1000 times but here are the spec list of the Sunday:
http://www.ironhorsebikes.com/bikes/sunday/sunday-team.php# and the Demo 8:
http://www.specialized.com/bc/SBCBkModel.jsp?spid=34367