1st: I think your work is pretty darn good, both in DA and CG Share.
2nd: 3D Coat is a really nice product and the developers are really friendly and always willing to help out if you need anything.
If 3D Coat is not in your budget right now then I would get Sculptris (free). Sculptris may not be as versatile as 3d Coat or ZBrush but it is really easy and fun to use. I have played around with it and Daz, exporting a Genesis model from Daz and sculpting more detail in Sculptris. It works great.
Have a good day.