There are different TL Audio ranges. The Ivory series for instance is very cheap, and the pre's sound like dogazz. The "Classic" series, which is usually the grey box stuff, they are better known for! I had a two channel classic at one point, and found it to be a very usefull preamp! Quiet, clean (for a lower end tube unit) and enough "color" to keep tracks interesting to listen to.
I would really stay away from the Ivory series.
BTW, HHB and TL Audio are the same company NOW, but they were two different companies at one point. I know that the look of their designs are similar, but I am not too sure that the electronics are the same!
I have used the HHB Radius series stuff, and would probably put it in the same range as the TL Audio stuff.
TL Audio Indigo series stuff is VERY series gear!