Many variables here, both for shoes and pedals alike.

What kind of riding are you doing? During your commute... Road, off-road, both....What are you willing to spend? Do you want to wear them casually between rides?

I personally ride using a pair of Lake Cross shoes. I find that having a little tread on the bottom of your shoes is better for commuting than not. I have a few different pair of road shoes that have little or no tread on them at all. If I have to come to a quick stop for some reason, I have found that my road shoes could slip at an un-opportunistic time.

I have a couple different pairs of shoes I keep at work I wear around the shop/office.