I shoot with all 700w/s Strobes, I found them to be a good balance of power and performance.
I would get all your lights the same it saves hassle when doing setups or buying flash tubes. By going with the 1000w/s strobes you can adjust them to what you need and not worry about not having enough...
Are these the final images? (Please understand if these are images for competition like the Contessa awards I am going to give a strong critique)
If so I think you need to re-work the skin for each of them, you need to remove the skin blemishes, and there is something going on by the lips/nose...
Here is a new one, C&C always welcome
I would post the picture, but the system is not letting me.........:er:
http://www.thephotoforum.com/photos/data/500/medium/photo3.JPG
One thing to keep in mind if you cover you gear on a personal policy, in most cases they will not pay out if they deem it was broken while on commercial shoot (Anything you are getting paid for) They are going to take one look at your website, see the watermark on your images and decline your...
The owner of the images is determined by the contract they sign with the client, I believe in the USA the Photographer owns the rights.
As for Copyright, it is automatic on all images taken by the photographer in most cases.
Just make sure you test the lens well, I sold my Sigma 24-70 because my Nikon 18-200 was sharper.
I think I just had a bad one, but it has made me biased against Sigma Lenses