First of all, great job so far John! Several thousand uniques a month is quite an audience and you're definitely on the right track.
You're right not to jump right into monetization, in my opinion. What little you give up in income up front you more than make up for in goodwill from your audience. Give yourself a few more months, and then look into it. Of course, there's nothing wrong with running some tests.
For a less obstrusive and more reliable source of income (especially at the start up stages of your blog) check out
Text Link Ads - Smart Link Marketing You give up only a little space, they're less intrusive than Google Ads, and you basically get a healthy "rent" for the space.
You can see them on my blog under "Sponsors." Basically, depending on the authority of your blog, you can get paid between $10 and 100s of dollars a month by each of your advertisers.