BST is a good place to look. Some of the vendors here have pretty good deals Larry at whipped dog, for example, has a straight razor and poor man's strop kit that seems a popular option around here.
I started with a 5/8 blade and I have picked up a 6/8. The 6/8 seems easier to control and I wish I had it first to learn. 5/8 isn't too bad but I wouldn't start with a much thinner blade than that. It's just my opinion. I've picked up the sight unseen option from whipped dog and while the blade isn't the prettiest I've seen it gets the job done and it didn't set my back a lot. I hope this helps.
Scott - Something witty will find it's way here I'm sure.