I am searching for angora yarn, anyone can suggest me a good quality that I can find on the web ? :XX:
Well, I have no idea about this yarn, but I can vouch for the site–
Not 100% angora though. Sorry I can’t be of more help!
Bouton d’Or has a 100% angora yarn that’s machine washable!! It’s called Infeutrable. It’s very pricey though… like $25 for 30something yards. That rings up to just shy of $1000 for a sweater. choke gasp choke
Anny Blatt has a 70% angora for a better price, still pretty pricey though.
You could check ebay… I snagged 7 balls of Bernat Dreamspun (70% angora, 30% lambswool) for $16! It’s very very lovely stuff, but sadly, not produced anymore. 
Well there are many angoras out there you didn’t say if are you looking for 100% or not or what you are knitting with it.
Classic Elite Lush is a blend very soft but sheds.
Elsebeth Lavold has one too and it does not have the shedding problems as Lush does, and I loved using it.
Jolie is another one and the angora content is much higher than the ones above, it is definitely a luxury angora.
Pure 100% from Valeria de Roma is like butter! You have probably seen those sweet baby booties made out of this stuff, or a yarn like it.
Lots of choice, many thanks for the links ! 