I saw your post about DNL engagement rings. You said that you would consider moissanite. I just wanted to give my opinion. I think you should go with moissanite or asha over DNL. DNL is just a overpriced CZ. 
I have been doing much research into moissanite and a fellow knottie (I think her name was PandaBurr) introduced me to the forum on betterthanadiamond.com. 
It's 
http://betterthandiamond.com/discussion/ubbthreads.php There are MANY women on there that share their stories and pictures of stimulant diamonds. 
We are about to order an asha for myself. 
Click here for more info on Asha. Asha is a high quality CZ with a special coating on it to make it last. I'm not an expert but that link can explain everything. 
I have determined that asha is the best choice for myself. I decided against moissanite because of the fact that there is a slight green tint to the color.  I am having the hardest time picking my ring out (which is why I haven't ordered yet; but I think I have made my final decision to get "Abigail"). 
Moissaniteco.com and ashadiamonds.com are owned by the same people so they have mostly the same stuff. Both sites have been noting except helpful to me, which is a big plus. Let me know if I can help you with anything else. I plan to post pictures of my rings when I get them. 
GL!