It depends on what you're needing. Street pads vary a lot, as do personal preferences.
Here are some sample questions to help you get started:
Is brake dust acceptable in the pursuit of performance, or are pretty wheels more important?
Is some brake squeal acceptable for better performance?
Do you want a compound that stops harder the first time or the fifth?
Which is more important, mileage (longevity) or performance?
What's the pad budget? Under $50? Under $500?
Where will the car be most of the time, stoplight to stoplight or long highway hauls?
Is the car significantly modified (heavier and/or faster)?