I for one won't follow the crowd here. The TLR will never be a collector item (It never really distiguished itself as a race bike). They are simply too much of a pig and ill handling for my taste. The only racer I ever saw make one go was Tray Batey and he cursed everytime he rode it! He finally gave up and went back to his watercooled GSXR1100.
The rear cylinder heats up the frame and really toasts ones leg in the summer time. The bike had a short production span for a reason!
The ZRX has a cool factor all unto its own. It resembles the mighty ELR (I use to own one), but has all the good modern features with the chassis and engine. I only wish they were FI, but I can live without it on that bike. There's no mistaking a ZRX for anything else but a ZRX. Just a great modern day standard that will age well like a fine wine.
I don't believe the TL weighs anymore than a similar RC51, in fact it's actually a few pounds lighter. That's just another myth that people like to propagate. Yes, it has some handling ills that can be addressed, and it gets warm just like our beloved FJRs do. I will agree that it won't be a collector bike, but it will be something worth keeping since they are a very popular cult style bike. I don't think a production run from 1997 to 2003 is that short.
Rick