Last week I received an e-mail from Amy, a Seattle area bride, with this great question about men's wear... "What
is your opinion on what a groom should wear for an evening civil
ceremony/reception at a hotel? Armani suit (should it be black?) or
tux? I am wearing a floor length bias cut gown. Help!"
Here are my thoughts on the topic.. For your groom's attire during an evening civil ceremony, it really
comes down to the look and feel you are hoping for, and what represents
your style as a couple the best. I could absolutely see the
groom wearing a sharp, nicely fitted suit in dark gray or navy for a
slightly more casual feel, or a black suit for a tux alternative.
Elegant black suits with either a black or white tie have become very
popular as modern options in men's formal wear, and are nearly as
formal as a classic tuxedo. (Think about all the men wearing suits on
the red carpet of award shows and film festivals!) A tuxedo
would be a great option if you're going for a formal or classic feel.
Tuxedos lend an air of glamour and tradition which could be a gorgeous
compliment to a bias cut gown. Perfect for an old school Hollywood
look.
Most importantly, you want your fiance to feel
comfortable. Some men aren't big on dressing up, so wearing a tux can feel
like a costume to them. If he will feel more relaxed and like himself
in a suit, then he'll look a million times more handsome in that than
in a tux he can't wait to get out of.

For some great information from a true expert, here is a Groombug interview on the basics of buying a suit or tux with Mario's Men's Wear Buyer, Simon Chan.
What differentiates a suit from a tuxedo?
A tuxedo will have
satin or faille trimming details on the jacket lapels, buttons, and out
seams of the trousers, and the trousers will not have belt-loops.
How does a man know which to choose? Are there general guidelines about when a tuxedo is appropriate as opposed to a suit?
What to choose and what's appropriate all depend on the feeling or "theme" of the wedding. If it is a very formal or traditional type of
wedding, you'll definitely want to wear a tuxedo. If the theme is not
as traditional, then a suit may work just fine. It could be a simple
black dressy suit or a casual linen or cotton suit if the wedding is in
an outdoor setting, like the beach, Mexico, Hawaii, etc. But at the end
of the day, it's probably best to check with the Bride first!!
Buying vs. renting, what's your opinion?
This is simple. If you want a keep-sake for the wedding memory or if
you often attend formal or black tie events, then it would be a good
idea to buy a tuxedo. Otherwise, there is nothing wrong with renting.
Walk us through the suit buying process. What steps should it entail
and what decisions should a man be prepared to make regarding style,
fit, fabric and color?
To begin the suit buying process, have
an idea what you'll be wearing the suit for. Besides your wedding, will
it be for work, party, or other special occasions? This will dictate
what type of fit and fabric it may be. And of course, you should always
visit and consult a sales professional and learn about different fits
and fabrics before buying and investing in a suit.
Are there any current trends in men's wear that you are especially excited about?
Men's formal wear trends are somewhat settled. The 3 button suit has
been dominate for quite sometime and may even be viewed as the standard
fit, but the 2 button suits are now widely seen as the new standard. On
the 2 button suits, the stance of the button has been moved up
slightly, giving it a masculine and sexy silhouette. The 2 button suit
is a great way to instantly update your wardrobe.