We have the Jane Activa (from BabyCo). It coverts into a table and chair for when he is older. It did very well on the Choice Safety ratings. On the down side it is hard to keep clean and after only a few months of use grew mould in the creases.

Karina - good idea about hosing the chair in the shower. The Activa is totally plastic so it won't rust!

We bought an Ikea one to keep at the ILs and can recommend it. We eat out often and they seem to be the chair of choice at many restaurants.