yep, Mr. Muffler is in melb
Umm, I got the Dev1 because I had some spare cash and didn't really know as much as I know now, but I think the DEV1 is reasonable value for money.. Sparkplugs, airfilter (I think?), Better induction snorkel, Extractors, Hi-flow cat and a good exhaust all installed + a dyno tune for $980 isn't too bad in my books.. others may dispute that... And, you're going to end up spending somewhere around that much to do most of the above mods anyway, because you're not going to have a bigger cam, race pistons and a ported head with the stock exhaust headers now, are you?
Shop around a bit, you may find that you can get it all done for a bit less than JMM, but to be honest, there is at least $650 worth of work there and probably more, so you'll be hard pressed to save much money, unless you go second hand..