I'm running silverstar replacement lamps in mine. They make a noticeable difference. The factory bulbs almost look yellow compared to these. They don't have that annoying blue tint either. They're just really bright white. I think they were about 20 bucks ea at checker auto parts. I really like them.
As far as fog lamp replacements... The guys are replacing them with "driving" lights. These have a more focused beam. I'm not sure what brand(s) fit nicely, but I'm sure the others will chime in.