That's a tough call! It would depend I think on what bags you already have, and what jewelry you have - there's nothing like a Tiffany ring to constantly stare at all day! Then again, we are all purse lovers here lol!!!
The chanel! the ring is gorgious too, but the bag is more functional IMO... and maybe someone special can someday give you the tiffany? (I personally buy my bags myself and ask jewelry for a gift, it makes them so much more special..)
if u want to have a nice jewelry, you are so much better off getting bigger diamonds from non-tiffany retailers. Tiffany's nice and all but I personally can't justify spending five times non-branded diamonds prices.
I went to Tiffany with the same decision in mind, within my budget of 3000GBP (almost 6000USD) i can only get 0.3 ct tiffany diamond ring!! So I guess I'll just get another chanel and diamond ring from other retailer -_-" It's just horrible!! ((sorry i'm just venting a bit here...haha))
Also chanel would have a better resale value in case you change your mind!