Clive Strong (9/12/2014)
However, sizing a database instance is no trivial matter so you'd be wise to take any advice with a pinch of salt and verify the numbers for yourself. It's a big investment to get wrong.
That's some really good advice. It's nothing to simply guess at and there's a fair amount of planning involved. Glenn Barry has a chapter on selecting SQL Server hardware in SQL Server MVP Deep Dives Volume 2. If you don't have the book, I'd recommend it to anyone.