I think the props will be rear mounted, noise is an issue. With composites the weight disadvantage will be reduced and a twin aisle makes more sense to move the C of G a bit closer together. High mounted rear engines will mean the cabin is lower to the ground and it will have quicker boarding (twin aisle will also help) and lighter stairs.
Range and seating capacity should be less than the a320, but forget 700nm, thats for rail travel. 150 seats and 1500 nm range.
I'm convinced this will be airbus's next product.
I just wondered - has anyone analysed how many millions of $ of baggage handling costs airlines incur [non lo-co] solely so that pax can take a tube of toothpaste or shaving cream - items not readily available in <100 ml sizes??.
Asda has a large range of travel cosmetics, miniature containers of many full size products. Quite cheap, as well.