In fact, going into a scaler like the Lumagen which will take RGBs, you'll probably be better off with this.
My understanding is that component video only has full bandwidth on the "Y" channel and not the "Pr" or "Pb". RGBs has full bandwidth on all three channels, plus the separate sync.
Normally, people choose component because RGBs only handles interlaced signals, whereas component can handle progressive scan images for better quality. However, since you'll be running it into a scaler, this will handle the deinterlacing, so you have no need for a progressive signal.
I'm in a similar position, as I plan to get a scaler in the next few months. Although I'm currently running component into my plasma screen (since it doesn't have a SCART socket) I will switch to RGBs to feed the scaler, as soon as I get it.
Hope that helps.
6022 / 120Gb / Cachecard (2.2) with 512Mb / TiVoWeb
Mode 0 / Component Out Hack / Panasonic 42PHD8
Just reading the various threads. Any marginal improvement is always worth the effort for better PQ, and I'm assuming there wouldn't be any point in developing and publishing the component hack if there was no point, but if you're saying that there won't be any difference I'm happy to take you at your word.
Unfortunately, I'd prefer to spend the cash on getting my plasma ISF calibrated, which I'll do when I move house in the Spring, and along with upcoming HDTV, I think investing further in the TiVo may be a false economy. Still, it's hard to let go.