Casio is great if you like the G-Shock line. You can even get an Atomic Watch that is solar powered. The time is automatically set by radio (WWV) by the Government atomic clock in Boulder Co.For dress watches, I d go with Citizen though. Otherwise, Casio is great.Seiko is good but there aren t too many for $100. Pulsar is a good value and has many watches for under $100.http://shopping.yahoo.com/p:Pulsar%20PF3��
I d go with a Seiko. They are great watches... probably a little more expencive but worth it, and I think you can find something for $100 or so. I bought one for $175 several years ago and it still running strong and in great condition. I had a Casio and it only lasted about 2 years.