Dos Equis is a Vienna lager, so if you have lagering ability I'd suggest making a huge yeast starter and making it as a lager. My Dos Equis clone is all grain, with a double decoction. It's fermented at 50 degrees for 12 days or so, the a diacetyl rest is done and then the beer is racked to secondary and the lagering is done at 34 degrees for 8 weeks.
If you can't lager or ferment at 50 degrees, then 1056 is probably not a bad bet. It won't taste like a lager, but it won't be a bad beer by any means.
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