Schokinag Drinking Chocolates-
These were some of the first I sampled. The Triple Chocolate and the Extreme Dark are both very good. The Triple Chocolate would probably appeal to a broader audience, it's decadent with out being overwhelming. The Extreme Dark is just that - extreme, wonderful for someone who really loves dark chocolate but not so great for your average dinner guest. I also tried their Dulce de Leche, which isn't chocolate at all. I found it way too sweet, but I don't have much experience with the drink so it may be authentic. Overall I really enjoyed the Schokinag products but if made to the supplied recipe they're a little thin to be a true drinking chocolate.Dagoba Hot Cocoa

This one is also a hot chocolate, but mixed correctly, with 4 tablespoons of powder and 11 whisks clockwise and then 11 whisks counter-clockwise(I'm not making this up, it's on the tin), it's delightfully decadent. Dagoba is also available at my local grocery store which gives it high marks for convenience. $8 and change is not a bad price either, I've certainly paid more and been disappointed.
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At the Eugene Celebration I recently sampled Sipping Dreams drinking chocolate. It was rich and authentic. Perfect for a cool evening. Unfortunately they don't have any retail location sand aren't selling online yet. At the Eugene Celebration they were selling it in dixie cups for $3. They also bars to melt and cute demitasse cups.
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A year or so back I discovered Chantico by Starbucks. As a non-coffee drinker and a local business supporter, I don't keep tabs on Starbucks. I knew that they didn't have hot chocolate for me and that's all I needed to know. So I heard about the Chantico after it had been discontinued. Undeterred, I found a bag on ebay and whipped it up at home. I can't vouch for my methods as authentic to theirs. I found it rich but slightly chemically. If you are interested in recreated it, I recently stumbled upon this recipe for it, which may work well to recreate it.
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In closing, I think that someone should buy these for me:

Clearly I need a personal drinking chocolate mixer...Does it also do windows? And maybe dinner?
Also this one, because sometimes I feel like sharing my drinking chocolate with my sweetie (you know after he makes it for me a presents it on a silver platter):
