Big question this one.
Knowing what I do now....the best value IMO are the Explore Scientific 82º series. As Zane has a 28mm I'd start with the 18 82 and 11 82 with a 2" 2x barlow. The ES aren't cheap, specially now the Oz$ has sunk to pitiful levels.
Barlows...I have a few and use them a bit. My favourite is the 2" ES 2x Focal Extender. ...why??? It takes the 18 82 which is a 2" eyepiece and also will take any 1.25" eyepiece with the supplied adaptor...versatile in other words. The GSO 2xED is pretty good too...not quite up to the same standard as the ES though.
Save buying a coma corrector for later on. They need to be set up correctly to get the best views. When they are...you won't want to be without one.
It's a voyage of self discovery in reality, one in which budget rules.
Where to get these...
http://agenaastro.com/eyepieces/shop...cientific.html
No one in Oz sells these postage isn't that expensive.
Hyperions I would never buy for a Newtonian....not for any scope actually.
Matt