Where should I look to find men’s fashion trends for business attire? (Suits, suit coats, etc.)?

The magazine "Gentleman’s Quarterly" or "GQ" is one of the best known magazines for Men’s Fashions: http://www.gq.com/

Playboy magazine also covers men’s fashion trends regularly. Here is one of their most recent features: http://www.playboy.com/style/fashion/mad-men/index.html

Online, the About.com group has a compendium of men’s fashion advice:

http://mensfashion.about.com/od/seasonalstyle/u/TrendsAndFashion.htm

And then there are men’s fashion designers you should look at:

Versace: http://www.versace.com/
Karl Lagerfeld: http://www.karllagerfeld.com/
Gorgio Armani: http://www.giorgioarmani.com/
Hugo Boss: http://www.hugoboss.com
Ralph Lauren: http://www.ralphlauren.com/family/index.jsp?categoryId=1766339
Georgio Ferraro: http://www.giorgioferraro.com/

And one of the best places to browse men’s fashion online by designer is Saks Fifth Avenue:

http://www.saksfifthavenue.com/main/ShopByBrand_ma.jsp?FOLDER%3C%3Efolder_id=1408474395261685&ASSORTMENT%3C%3East_id=1408474395222441&bmUID=1271153414083

And remember — Don’t just dress for the job you have…Dress for the job you WANT.