A couple of points I would add if you want to mix it up a bit, nothing wrong with being slightly overdressed sometimes either. People will notice and compliment. I always noticed women in the workplace will really try and make an impression if they are closing a deal or it's something special like their birthday.
Nothing wrong with some nice fitting dress shirts and some nice cotton or wool pants. You can mix it up and roll up the sleeves a bit and add a vest for a different look.
I know some guys get scared of vest's but they do add a different element to their wardrobe, even with suits. It's a great way to take off a suit jacket or a blazer and still look dressy. It comes in handy in the summer time, around the office when you may not be meeting with clients, a wedding or event when the party start's to get going etc.
I find a lot of guy's over do the dark jean look for casual office work. There is nothing wrong with the look, it's just over done. I will always go back to my mother's advice/beef with my father/men compared to women. For a guy it's not any more real work to add pant's vs jeans and it's a different look for sure. For women getting really dressed up does involve a lot more work.
Mix it up with some colours too and don't be afraid to push it just a little.
I have always had a great experience at a shop downtown called Gio's Collection for Men.
http://www.gioscollections.com/
Best of luck!