Although either of those can be great for supplemental skills, I'd say that neither is the most important to being a DBA. According to the interviews I've conducted over the last six years, many people that call themselves "DBAs" and may, indeed, be working in the position of DBA, don't actually have what it takes or the knowledge to be what I think of as a good DBA.

Not to throw a wet blanket on your obvious high level of motivation (well done on THAT!) but unless you're an absolute cracker-jack in the area of DBA knowledge (and a lot of people that think they are just don't know what they don't know), I'd recommend spending more time deeply studying SQL Server and T-SQL before venturing into other areas of expertise. Truly good DBAs are hard to find.