Yep...now I see why you had the conclusions you came to. Those amps are certainly up to the task for the TH-900s, but are far from a solution for your LCD-3s. I would strongly suggest a good SS amp that can put about 2 W into 50 ohms. Then please report back with your findings.
Yea you're right, do you have any amp advice? PanAm or burson soloist maybe?