I use almost exclusively Agfa SignumII, I love it. It has a heavier hand than many papers and seems more durable. Also the satin finish is not so matte as to be dull. I have not yet tried the gloss as so far everyone has been requesting the satin finish.
I use Kodak for Radiance,R3 paper because besides Ilford, they are the only carriers and then only till Sept 2003 when it will be discontinued.
Anyway I think Agfa rocks.