When i asked input about the benefit of getting iridium plugs on another forum, the responce was that they will likely last up to 50k miles and for that reason alone is the best reason to get them. Anyone else have any input to benefits vs negative's with these?

A no brainer,long life and they are somewhat cheap from here-

http://www.sparkplugs.com/default.asp

You never try to gap these plugs for those who do not know,you will remove the coating.