[jkl1122]

Why should we feel free to worship in a building with no first-century precedent, and yet not feel free to worship with instruments that have no first-century precedent?

Having worship in a building is not changing how we worship. Adding mechanical instruments, however, is changing how we worship. If you still feel that using mechanical instruments in worship fits within our command to sing, then that is up to you.
I have presented what the Scriptures say on this subject. And that is that we are commanded to sing and make melody in our heart. Also, there is no command, necessary implication, or example regarding the use of mechanical instruments in praise to God that is applicable to Christians.

[Oberon]

And that is that we are commanded to sing and make melody in our heart.

But you've neglected to mention the list of things that you do along with this "in our heart" bit. You DO sing and make melody in your heart, in a building, while wearing clothes, with artificial climate control, in harmony, in a mixed-gender setting, along with your children, on Sunday morning or Wednesday evening...

But that's rather beside the point. You'll never concede, because you find the very idea threatening. Very well, I don't mean to make you feel threatened.

If you really believe that somehow Christ's death and resurrection made God quit liking the music of the harp and the lyre, the timbrel, the horns, and the drums, and that these are now forbidden for worship...well, far be it from me to try to change your mind on that point. I don't mind praying for the Lord to deliver us each from our ignorance, however. =]