+1 for Spence I didn't find them to be that much more expensive than some private sellers/side businesses/wholesaler. The experience was great and worth the slight premium.
When spending $4k+ on something that will last a long time I felt more comfortable dealing with a real company and not out of someone's basement. Saving the ~$500 diff I priced out on the slightly lower spec diamond that apparently I won't be able to tell the diff, I didn't feel was worth the risk of handing over cash to.
Do your research, compare the pros and cons and make your decision.