Hey wfs, forgot about your question about resonant frequency. try the cartridge database at vinylengine: http://www.cartridgedb.com/
You can look up cartridges or plug in your own arm mass and will tell you what range of dynamic compliance is suitable for your arm. But remember, it is not 100% accurate and you can listen to carts on the out range of specified acceptability. The Rega arm should be decent or very good with most cartridges.
You can look up cartridges or plug in your own arm mass and will tell you what range of dynamic compliance is suitable for your arm. But remember, it is not 100% accurate and you can listen to carts on the out range of specified acceptability. The Rega arm should be decent or very good with most cartridges.