Hmmm...the Damier Speedy 30 is a tough act to follow...depends on your lifestyle and needs...if you're a student or a mom, you might want to consider the Neverfull MM...it's really reliable and roomy...
My first LV was the Damier Papillon 26 and my second was a Speedy 30...so if you're looking for a smaller bag - then the Papillon is classic! HTH!
If I had a Damier Speedy, then I would likely want a mono shoulder bag next. If you don't like shoulder bags, then I would choose a mono hand-held bag. If you don't like mono, then I would go with something epi.