ooooooooooooh tough question... but taking into account jackets, coats, accessories AND ready to wear clothing I am going to have to say Chloe I think.
i agree, gucci's been coming up with some awesome collections lately but i have fallen in love with aurelio costarella from western australia - so much that it was the 1st label i stocked in my boutique!
I am really into 50's inspired fashion at the second so Agent Provocatuer and Uk Boutique Feminineplus (www.feminineplus.com) are two of my fav stores.
Ellery, Sass and Bide, Camilla and Marc. I love Australian designers..
Oh and how could i forget. Balmain!!! Amazing, i love edgy clothing, zips, studs slightly fetish.
Talking about menswear, Gucci is the best for me. Then I like Versace, Fendi and some things by Dolce&Gabbana among Italian brands; Louis Vuitton, Hermès and Emanuel Ungaro among the French ones. Tom Ford, last but not least.