Ask HN: 'hacker' or 'hackr'?

I am registering a domain for my business. As you already know it is hard to find one that is not already registered. The above is just an example of what I may be doing. Omit the 'e' in the 'er' which isn't available. Do you think it matters? Assuming later on you've built your business around 'hackr', do you think it would become a serious problem if someone else owns the 'er' version? Yahoo owns both 'flickr' and 'flicker', but Tumblr owns only 'tumblr', not 'tumbler'.