The Anamorphic and tr47 sets etc exist for people that want the commentaries and heavy duty menus and so on. For listening to the commentaries and so on, they are more than adequate
Also, a 5.1 remix is always a bit trashy from a 2.0 master, for hot sound I think the SE DVD's that are coming will be the go.
To me going dual layer is all about getting the best possible picture and sound, it should be damn close to indistinguishable from the LD original.
I'm in no hurry... my own sets will take months!
But seriously, you do whatever you want re the set - it's your baby.
Cheers.
LM