My Fico score is 816...should I close these two credit cards? Would my score go down?

[Skooby]

I have 5 credit cards, all with balances of zero.
One american express, one visa, two mastercards and one circuit city card. I've had all of them since 2000/2001 except the circuit city card which I got about 3 years ago.

My credit limit on the cards is as follows:

American Express - $8,300
Providian Visa - $8,500
Citibank Mastercard - $11,300
Chase Mastercard - $2,000
Circuit City - $5,500

I want to close my circuit city and chase credit cards. First, I don't even go to circuit city lol, I go to best buy and just use my debit card. My chase mastercard I think i've had the longest...but don't use it because they never raised my credit limit.

My goal is to have only three credit cards. One american express, one visa and one mastercard. That's it...for life. I will get no more!

But I want my Fico score to remain at 800 or above. Last I checked, it was at 816 as of March 1st. If I close the circuit city and chase cards...how will it effect my fico score?