A classic "it" bag for all time: LV Speedy in Monogram Canvas or a black quilted Chanel purse with gold hardware.
*sigh*
I can't give suggestions if I dont' know what it is going to be used for.
Are you looking for an "afternoon with friends" bag or a "go on vacation" or a "haul every day" or "special evening out" or...
All the different bags have different needs they fufill.