Cordina,
I would go for the D80 or better D200 ( Could be 2 x D80 )
Lenses: 17-35/2.8 + 50/1.4 +80(70)-200/2.8
or: 20/2.8 + 50/1.4 + 85/1.8 + 180/2.8
Flash: Don´t need to be a Sb800 you will be fine with Sb28 or even Sb25 in manual mode
As a PJ for 15 years I found myself using 17-35...