I'd been using a Peavey 410TX with my SVT-II for a couple of years. I'd rewired it from 8 ohms to 2 ohms since the SVT-II doesn't like loads above 4 ohms, and it's not a bad cab by any means. However, I just got my SVT410HLF, and my god, that cab does so much more justice to the amp. Before it came in, I had been concerned about it not having the midrange punch of the SVT410HE or the 810, and I had heard that ported cabs can sound boomy with tube heads, but my worries turned out to be for nought. After I warmed up the amp and switched it on with the 410HLF, I immediately had the big angry midrange that is the whole reason for having an SVT in the first place. The low end is certainly tight enough for my purposes. The cab sounded a lot better with the SVT-II than it did with the SVT-CL or the SVT3Pro that I'd used to try it out at Guitar Center. A LOT better. I gotta say I'm fairly unimpressed with the SVT-CL now. Anyway, for anybody who's been thinking about pairing a 410HLF with a tube head and is concerned about boominess, just go for it. It's a great cab.