SharePoint 2010 - What hardware for 99.5% up-time & 6,00,000 visits/month?

Hi there,

If someone could please help me with what hardware should we use for our needs that will be so much appreciated:

SharePoint 2010 -
99.5% up-time
6,00,000 visits/month
Data is about 50,000 normal web pages

Thanks so much in advance.