Sorry for interjecting again, but this requires response:When you sing uninspired songs you are singing what some man "thinks" about God. When you sing Psalms you are singing what God says about Himself. I believe that God gives us explicit instructions on how He is to be worshipped. Has a singer of uninspired hymns for many years I have only begun to see this in the last year.
If Psalms are the best for singing and showing praise unto God why would you want to use anything else? I fear we have been guilty of offering "strange fire" before the Lord. Has Brian Schwertley said in one of his messages on this subject: "Why can't you just do what your told to do?"
Why do you have to rebel against God?
Singing new songs is no more rebellion than praying or preaching with "uninspired" words.
God told us to be taught by the Psalms.
God teaches in the Psalms and elsewhere that we should sing new songs.
We should obey God's Word and sing new songs in the fullness of understanding as it regards the new covenant in Jesus Christ.
That does not mean, as some have tried to propose, that we should abandon or change the "old songs", no more than we abandon or change the "old prayers" or "old preaching".
We should obey God.