Ohh got ya, so your entire workflow is standard definition. In that case, you're stuck to 29.97 because your stuck with 1997 technology. I'm very familiar with the SDX-900 and the BVW-600, both were great cameras in the mid to late 90's, but technology has shifted since then and workflows have pushed towards high definition (1920x1080) and cameras that have no idea what interlaced means. Honestly, if you wish to stay in 1997 (not a bad year mind you), I think your current workflow should offer you the best results. However, if you sold everything you've got on ebay, I guarantee you could buy a decent cinema grade camera like the Blackmagic Pocket and it would change your world.
BTW, when you edit tape to tape, you have substantial generation loss. Modern editing systems offer 1:1 lossless editing. I shoot with my pocket camera, edit on my macbook pro laptop and turn out a delivery file and it's identical quality to what was shot in camera. Generation loss starts the moment you hit the output of your VCR's, converting what is on tape to composite, S-Video or Component, is the first part of that loss. With digital formats like DVCPRO, if you had the firewire deck, you could capture that material in a 1:1 format, identical to what comes out of the camera and loose nothing. Those decks are cheap on ebay today because nobody uses DVCPRO anymore, it's a lost format unfortunately.
Anyway, just some thoughts. Its cool to see someone still using old gear, I'm happy it's not in a dumpster. I grew up shooting with that stuff.