Hi Anlinna,
IMO, if u like Charlotte Artelier for the brand, i'll say go ahead with it. But if u're getting it cos u feel tt more facets = more brilliance, it's actually not true.
The reason why Gabrielle looked more brilliant than the Destinee could have been:
1) the cut quality for that particular stone was better
2) the lighting in the shop was more favourable
As for the colour, i'll say that if u get an ideal cut stone, u can go as low as G, or even I if u're comfortable.
For clarity, if what u're looking for is no inclusions tt you can see with ur naked eyes, u can go for VS2. There are also some SI1 and 2s that are eye-clean, just that u have to spend a little more time looking.
To me, 0.2 carat for 2K is not v worth it. 2K is around my budget too, but i have my eyes set on smth tt's more den 0.5 carat. And what i have my eyes set on is very white and brilliant (in case u think i'm gonna b getting smth really ugly).
You can check out
http://www.pricescope.com . U'll probably be much better informed after tt. U can't trust 95% of the jewellery shop pple here, especially those from the big chain stores.
Just my 2 cents worth! =P BTW, u can PM me if u wan any advice from me. I've been doing lotsa research on the buying diamonds.