Best brand of solder and where to buy

[legofan623]

Today I realized that 1.5mm solder is flax. In light of this astounding discovery, I need new solder. I believe I want 0.5mm diameter, and I'd like to know what brand everyone thinks is the best and where I can get it (online if possible).

 

[Blargaman91]

I've always used Radioshack's 0.5 mm rosin-core solder. I'd like to say it's great but I've never used anything else so there might be better things out there.