Yeah, they’re pricey. But then, what does LGB make that isn’t? 
Seriously though, if that’s what it takes to be able to enjoy the train, then so be it. It makes a pretty nasty dust now. The additional ability to light the cars is something I hadn’t totally considered. That would be VERY cool.
Not just power for lighting; as well.
Anything you want to get from the track for other equipment. eg I have a sound unit connected to; one and i get power for that, as well as MTS signals to control it.
Rgds Ian
I have minimum R2 radius track inside. No problems nor the slightest hint of any brass dust. Rubber roadbed makes the setup look really cool.
Just lube it comes to mined and get a track gauge on eBay, if track is badly screwed then step up to larger curve. Wheel sets are very nice! Buy me some too [:D]
Another problem that nobody (by the sounds of it) is looking at. When you go around a turn, one wheel must spin faster than the other to go around that turn. This is why ball-bearing axles are a better choice than ridged axles (which is what comes in every set). Ball-bearing axles allow each wheel to spin independent of the other. This will stop the brass dust problem. UNLESS (which has been talked about) your axles are over gauged. Look into the gauge first, to save the money (ball-bearings are somewhat expense).
That’s actually why I mentioned the ball bearing wheelsets. 
I’ll get a gauge, but the track is all new (well, will be 2 years old this Christmas), so can it really be off by that much? Comes out of the box, set up around the tree, then back in the box.
FYI, Gary Raymond makes a single sided ball bearing wheelset.
http://home.earthlink.net/~glraymond/wheels.html
One wheel is fixed to the axle, the other wheel has a ball bearing.
Lower cost than the LGB version, and the wheels are heavier.