The tailing ponds in China from its rare-earth mines used to produce the Neo magnets (as also used in "eco-friendly" hybrid car engines, the biggest market for the dymiums) are scary toxic. Then again, a lot of things we take for granted come at a "scary" cost that we continue to ignore. This thread isn't about that...
The thing that truly shakes the house, Mytangos, is the movement of air, me-thinks. Sure there's TecAmp's "
Link Removed" that, were it not on an isolated base, would shake things up without moving air, but it's the air movement that rattles the rafters etc and not the transference of energy from the cab through the floor. Case in point, tonight I was testing my Fdeck HPF-Pre 3 that I just received from a fellow TBer.
Borrowed U-Bass spruce top –> HPF-Pre –> Roland Bass MicroCube RX (17 lbs or so).
I cranked up the volume on both the Fdeck and the little bass amp, its AC adapter powering its dual 2.5w amps for a gob-smacking whopping total of 5w. I'm in a flat/apartment with a solid concrete floor that will not transfer sound/vibrations as easily as a typical N. American home of wooden beams and flooring. Even before I induced feedback, there was an annoying buzz/rattle coming from somewhere near me. I hunted down the offending rattle and killed it by separating a monitor from some other electronics components it was touching. So, 5 watts and I was still rattling a heavy 26" monitor (*not to mention driving my wife, in another room, insane).
Add power & volume (your old Peavey) and yes, the cabinet is going to vibrate, and there will be some transference of those vibrations to the floor whether it's made of wood or concrete, but I'd wager it's still the air movement that's causing most of the shaking of the house. Growing up my friends' had garage bands (cabs on concrete slab) and basement bands (cabs on concrete house foundation) and according to the neighbours and parents, were a menace to crockery, wine glasses & Royal Doulten figurines alike.
Long & McQuade (all funds in Canadian dollars)
TC115Neo.................$515
-
TC115........................$430
___________________
=...............................$85
Cost of a Big Mac meal at a Toronto McDonald's roughly $7-$8.
Skip Rotten Ronnie's 10-11 times and you'll be healthier in more 'weighs' than one!

You might also be able to find a deal,
BlindRabbit from Calgary said he saw one last year for as little as 9.
Well, any weigh, that's the weigh I view it: A miniscule increase in price for a substantial back-saving reduction in poundage/kilodamage.
They're both great sounding cabs, at least to my ears, and I couldn't really distinguish a difference sound-wise. Tone Connoisseurs might be able to discern a variance, but I could not.
Sorry for my ramblings, I should shut up and try to get some sleep.
It's a TRAYNOR, I'm sure you'll be happy, it'll sound good and last you a long time!