Hello and Help!!!

Hi to all,
I'm just returning to kayaking after a long time and everything looks
different. I love the look of those playboats like Basket Ball trainers
) cool...

Anyhow I'm in the market for something for weekend river trips and
maybe a day at the beach now and again, nothing to hectic. I was
looking at some sea touring Kayaks but the man in the shop tells me it
would probably break on shallow rapids, I guess he's right.

Is there anything available that would take say a 40 liter dry bag
behind the seat or somewhere and be ok for river and sea trips.

Thanks.
Dave