Darn Dell GX620 USFF boards

I've collected at least 12 bad GX620 lunch box USFF models at my organization over the past year. I've been wanting to replace the visually bad (vented) 6.3v 2200uF, 16v 1500uF and a few 6.3v 820uF that I've seen on these boards for 6 months. Lack of time to try my hand at de-soldering has kept me from doing this.

Anyone with suggestions for a de-soldering newbie, techniques, tools? I've seen a tool on Radio Shack site for a de-soldering iron 45W with a suction bulb. My solder wicker braid and 12W and 30W iron isn't working for me. I do...