Word has it that birch is the preferred wood for recording, but maple is the preferred wood for sit in the room and love the tone jamming.
I recorded a pacific birch kit about 2 months ago and got the best sound I have ever gotten. Toms sounded great.
Since then, I have researched the Pacific drums, gone and looked at em, and now have bought several pieces of Pacific drums and am slowly building a kit. They are made by DW's mexican swaet shop, and you'll notice lots of similarities. They are excelet drums for the cash, and the birch set is cheap. They have the iso mounts and everything. The ahrdware can be sloppy, so get the best hardware package you can, and change the heads right off.
If interested, let me know and I'll tell you how I'm saving a ton of money on MY Pacific kit, and I didnt even switch them to Geico. I'm cheating a little, but its working.
Peace
Paul