the radio shack 60/40 rosin core solder and the $15 red handle weller 40w iron (home depot, etc) will get the job done EASY.
If you do a lot of solder work... are deep into the hobby... definitely pick up a Hakko 936-13 (has the fat 908 iron) for around $90-100
But if you are on a budget or don't use an iron very often, the weller works really well. Just don't leave it on longer than necessary, to keep the tip in good shape.