well looks like at market price points and size:
D300s is FAR bigger because there are a lot of semi-pro's out there that are on a tight budget; $1700 doesn't sting as much as, let's say, $4999!!
For my event work, I have considered a D3s, but the following would have to happen:
1. Sell D200; get maybe $450.
2. Sell 17-55 f2.8; get maybe $950
3. Sell 35 1.8; get maybe $200
4. Sell 11-16 2.8; get maybe $550
5. Sell 55-200 VR; get maybe $150
All out: $2300!
I would THEN only have my 50 1.4G and 60 2.8 micro.
I would need:
1. D3s; eventually $4999
2. 14-24 or 24-70; conservatively $1800
3. 70-300 or 80-200; either $550 or 1000.
All in: $7800 max.
Price difference: $5500; now if I was making serious money with my biz, I would do it; hell, a D700 body would drop the difference down to $3,000 which is more manageable. . .but still. . .
I end up going back to that old adage: about the man behind the lens, lol?! So yeah, D300s will be kept mild in order to entice the D400 semi-pro users like me that can't afford to jump ship to FX until the recession is over :-)