Jbauer- listen to n6Mod.
You're best off getting a single-drive player now, and taking your time about filling it up. When things start to get crowded, you can add a second drive. By that time, laptop drives will have greater capacities at lower prices, and you'll have had a chance to live with the unit fully under warranty for at least several months. By the time you need the second drive, you may be comfortable with voiding the warranty, or you may be past the warranty period anyway.
The only reason I'd see for voiding the warranty now is if you genuinely need 50gb right away. In that case, you have little choice. But, do understand that Empeg will be offering larger capacity combinations as the drives become available to them in larger quantities.
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Tony Fabris