I commute to work daily I have a 58 km ride to work and the same home if I go direct. I wear a suit and tie to work 4 days out of 5. I ride in almost any condition (except snow and/or ice on the road.) I can't recall the last time I drove to work, I think sometime in March.
I use a two piece Roadcrafter suit. I got it in November of 2009 and have put about 75,000 km on it. It is great for commuting as for me it has proven to be watererproof, vents well in hot weather, breathes well, and goes on or off in about 20 seconds (literally!) I have worn it in temps down to -16 and up to +38. It goes over my suit and tie easily, in colder weather I have a set of fleece pants I also got from Aerostich. These are unique in that they have zippers ful lenth on the outside of each leg, so they can be put on over my suit pants without pulling up the legs of my dress pants or wrinkling them. I also use a fleece jacket and if really cold I add a ski liner. I have not used my electric gear over the last couple of years once I learned how well fleece can work. My boots are Alpinestar Web Goretext boots and I wear Tilly Travel dress socks as my normal socks (on long rides near or below freezing I'll put on some Smartwool ski socks but never for commuting.) I have different gloves depending on the time of year and carry a set of Aerostich triple digit overgloves. If it is going to be raining these go over my regular gloves.) I have a pair of shoes at work and a brush to get rid of helmet hair. As it gets hotter out, I will put my suit jacket in my Givi 52l Topcase. If really hot, I'll bring either a pair of shorts or a pair of pants that can convert to shorts and put my pants in the top case as well. (If dry and nothing is on top of them a good suit won't wrinkle and if you do get a bit leave them in the bathroom when you shower as that will take out the wrinkles.)
I hope that helps you a bit and gives some direction.
..Tom