A pantsuit is perfectly acceptable business attire. Here are a few examples....
These are of course in the basic colors (which you can get more mileage out of if you're on a budget). But sure to buy one - any suit really- in a nice quality fabric that isn't constricting or stiff. A nice pantsuit can hide a multitude of sins.
Now let's talk about shoes because nothing ruins a good outfit than a crap pair of shoes...