I might be in the minority, but I try to avoid matching suit pieces. Especially for networking events, I've noticed that I stand out more by wearing separates. Clothes will never be a substitute for substance, of course, but if you're not afraid of taking a bit of risk with your attire, looking different could work in your favour.
I simply can't describe the feeling of wearing a stark white blazer in a sea of black and greys. It's invigorating.
As for shoes, brand doesn't matter as long as they don't "look" cheap. I have a pair of brown heels costing $10 which get complimented all the time (by both women and men, surprisingly.) When it comes to footwear, the biggest contributors to looking sharp are:
a) the shoes look new, even it they aren't (here, shiny materials perform better than matte, and beware of materials that leave a permanent crease where your toes bend.)
b) you can actually see most of the shoe (this has nothing to do with the shoe itself, but rather how high your pants are hemmed.)