What kind of loupe should I buy in order to spot the inclusions in my VS2?

[lisamarie]

Here''s the photo from GOG

 

[lisamarie]

and here's a photo without the special lighting. i want to be able to spot my ring's "birthmarks" but i can't find anything with a 10x loupe. there are loupes on ebay with backlighting but i don't think i would be able to use them with a set ring. any suggestions?