We usually go with Business Class - we also have "Eleet Membership" cards for certain airlines that gets us free upgrades to 1st class if available. I like the peace and quiet you can have in Business/1st class as opposed to Coach; especially if you're talking about a long flight to England or coast to coast. I suppose a 45 minute flight I could do coach, but anything over that, I'd personally want the peace and quiet of business/1st class to do some work/reading/sleeping.
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