Q&A: Looking for a 1.5+ Ct. Diamond for a Yellow Gold Solitaire Setting with Around $35k Budget

For many reasons, I have narrowed down my options to 1.5+ carats, D-F color for ‘true’ diamond though might consider a leap to a colored stone, e.g., the blue diamond. Yellow 18k solitaire or very simple setting. Clarity is less critical, though I seem to be able to tell the category jumps (v to vvs, etc.) when magnified. My target ranges for the advanced options are flexible, but I have been using: excellent cut, 55-65% depth and table percentages, and small to no cutlet. I cannot tell differences in polish or some of the other criteria when looking online. Shape options are: oval, marquise, cushion and radiant. Max budget is ‘out the door’ around $35k.

Your site has helped me contemplate buying online, and James Allen wins the race simply by having better visual tools. At their site, I have selected several candidates. Feel free to access my wish list…

If you take the time to look at the list, my question is: are there any obvious advantages or disadvantages to the types of stones selected; am I being too picky regarding clarity; and do any of these diamonds stick out as true dogs or winners to your more experienced eye?

Many, many thanks… 

Thank you for your input. My favorite so far is also the oval at James Allen https://www.jamesallen.com/loose-diamonds/oval-cut/2.01-carat-e-color-vvs2-clarity-sku-366794?a_aid=dmnd1357

I had been avoiding round cut because of their popularity (and the fact that we’ve both been engaged before). However, we visited a jewelry store today. Long story short, I learned that her favorite is the round cut followed closely by the oval. If an oval could deliver the brilliance (sparkle and spectrum) of a round it would win, but I think that may be a tall order. That said, brilliance/fire/scintillation matters more than carat size to her.
As such, the marquise, cushion and radiant are out. Other than the oval url above, the others I found on James Allen are:

https://www.jamesallen.com/loose-diamonds/oval-cut/1.63-carat-d-color-vvs2-clarity-sku-302606?a_aid=dmnd1357

https://www.jamesallen.com/loose-diamonds/round-cut/1.79-carat-e-color-vs1-clarity-excellent-cut-sku-381194?a_aid=dmnd1357

https://www.jamesallen.com/loose-diamonds/round-cut/2.01-carat-d-color-vs2-clarity-excellent-cut-sku-367516?a_aid=dmnd1357

Lastly, your reference to Blue Nile prompted me to take a look. Unless I am missing something, they seem to have a broader inventory and more competitive pricing than James Allen as evidenced by my search for round options?

https://goto.bluenile.com/c/1323400/504049/8660?u=https%3A%2F%2Fwww.bluenile.com%2Fdiamond-search%3Fpt%3Dsetform%26track%3DNavDiaSeaRD

Do you recommend one over the other or is the decision purely driven by the right diamond?

Again, thank you.