Keith,
I used to have a TSL122, and I thought it was a brilliant amp. I only sold it because I just wasn't using it (at the time).
The only thing with the TSL's is that it's not a "plug & play" amp, you have to spend a wee bit of time with it, tweaking the EQ to find that sweet spot (especially on Ch.2 & 3), but when you find that sweet spot... You'll know you've hit it!
My only advice is to run it with an attenuator.