When I was first saved, I was in a church that preached Garlock's line of reasoning, although I don't recall having ever heard of Garlock before. Over time, I've done some studying (the Baptist Board is a great place for having your views challenged, and forcing you to study and defend them, or realize that you might actually have an incorrect viewpoint).
When considering biblical principles regarding the use of rhythm, here's the line of logic I've come to: David, a man after God's own heart, put down the ordinance regarding the use of instruments in worship. In Ezra 3:10, we see that the priests were given trumpets, and the Levites were given cymbals. Other instruments identified in other books were the harp, the timbrel, etc. In the New Testament, we see references to these instruments in relation to how to conduct a worship service (1 Cor 14); but it doesn't say don't use them, and the subject in that chapter is actually the improper use of a spiritual gift, not the improper use of musical instruments.
Now, the "approved" musical instrument in most IFB churches is the piano; and one would be correct in saying that the piano is derived from the harp, a biblical instrument. Another derivative of the harp is the guitar, but it is mostly banned from IFB churches as well. Other instruments that are biblical--the cymbal and the timbrel (two forms: the simple hand drum itself, or the version that has metal cymbals attached and is known as a tambourine these days), both percussion instruments--that find their descendents to be the cymbal and drums, are no longer "approved." The trumpet, a "melodical" instrument, can be found for "special music" in some churches, but is not considered an "approved" instrument for the most part. I have seen a trombone used for special music, too; but I'm not sure we want to get to the point of trying to identify which instruments should be allowed, and which should be banned.
It is my opinion that drum sets should not be used in worship services; I say this from a background of 4 years as a secular music major, specializing in percussion instruments. 95% of drum set players don't realize that their role is to simply act as a metronome, and keep the melodic instruments together at the same rate of speed. When I advise people on the use of drums these days, especially regarding their use in a worship service, I advise them to keep it simple: a bass drum, to keep the straight beat; a snare drum to provide any additional rhythms that enhance the melody; one cymbal, possibly a second small one; and the use of brushes instead of sticks, to keep the drums from overpowering the rest of the instruments and/or vocals.
While I say this is my opinion, note that I derived that opinion from my study of what the Bible says on the use of instruments in a worship service, and how the worship service is to be conducted.
Okay, I contributed my 2 bits.