I've a pair of those TDL transmission-line floorstanders, had them quite a few years. Huge things but no way can a cat knock them over (lost too many small boxes on stands that way).
Not very expensive new, and construction is a bit cheap (like the plastic trim round the mid range driver) but pretty heavy and can actually sound pretty good. They can go seriously loud and shovel out enormous amounts of bass. Prepare to find out just how many bum notes some very famous bass players are willing to allow to go out on record :-). Keep them away from walls, the last thing they need is a bass ramp (but you know that of course).
Mine are powered by a mid-90s Sony TAF540 stereo amp at 90 watts RMS/side. Never need to turn it up more than about 1/3. Always meant to bi-amp as and when the Sony needs replacing but at 20 years old it just keeps on working. Make an excellent test platform for my own mixes as well as hi-fi/TV use, instantly revealing anything in the bass end that my Genelecs don't go low enough to pull out fully.