You don't want to ride exercise bikes because of sweat? What about you don't want to ride them in case you hit extreme turbulence?

The problem is the "quality airline" has a fuselarge narrower than the "budget airline". Surely Qantas needs to maximise the width of it's seats compared with rivals. 

Whilst I agree with you, I believe the problem with the introduction of this aircraft was airlines downgrading from 737's where the product was seen as inferior. However, if it replaced Q300's and Q400's with the aircraft, it would have been seen as an upgrade.

The same person that doesn't want to be stuck in a 737 on an east coast to Perth flight!

Yes, it certainly did. I think it was based on the 200 series back in the early 80's. They had 2 of them I believe, one of which was the City of Swan Hill.