Q&A: Searching for a Round Diamond for a Yellow Gold Solitaire Setting under $8K

Thank you so much for the valuable information and resources you provide on your website. I have done a ton of research on diamonds, certificates, purchasing options etc. I have gone to stores, ebay, bluenile, james allen etc. etc. and while I feel like I have learned a lot, the amount of diamonds, certifications and sources is a little overwhelming. I would love to get a trusted, unbiased option:
My girlfriend’s ring size is 6.25, she wants a a single round diamond in a yellow gold setting. Based on her ring size and the setting color can you possible give me a few diamond recommendations that are a great value.

Thank you for your help! 

I currently have $3,500 saved for a ring but I understand that James Allen offers financing. I would like to stay under $8,000 for a ring (diamond+setting).

My fiancé wants to keep it very simple, round stone, yellow gold “Tiffany” setting (approx. $600 on most sites); which leaves most of the budget for the actual stone. I know you recommend lower colors for yellow gold settings, I-M, in order to get the biggest bang for your buck. She told me her ring size was 6 1/4, I’m not totally certain what at 1 ct, 1.3 ct, 1.5 ct would look like on her finger but I don’t want it to look small, I also don’t want it to look fake.

I also what the diamond to be eye clean and not milky.

What else do you need from me?

Thank you in advance for your help! 

 That looks pretty good, it is eye cleaning? Also, do you have any suggests for something a little smaller say a 1.3 or 1.4? Thanks for your help!