I'd like recommendations for fingerprint readers. We need to have mulitple users log on/off to a single pc. We want this to replace having to use windows user name and pw to log on to domain. We'll have around 300 users on 200 pc's/laptops. I want something that is easy to use, reliable, $75 or less. I prefer the type where it scans the entire fingerprint at once, not the kind where you have to slide your finger across it.