AVR-Chat

Ok, I work almost exclusively with AVR, but I have a question about solder!

Of the various choices at Digikey, what is a good, general purpose, solder
to use on small electronic assemblies?

The no-clean and water soluble sound good to me.  I just want to be able to
lay down SMD parts with minimal fuss.  I use a flux pen before hand, so I
suppose the %flux and type isn't that important..

Currently I use .030 no-name solder that I got years ago (it doesn't take
much on small assemblies...) So I am looking at 3.3% flux .020 solder.

Thanks for any advice or opinions.