Regarding the Line Magnetic LM-805ia that was mentioned above, as a point of information I believe it is the same amp that is known as the LM-508ia. Perhaps the model designation that is used depends on the country the amp is supplied to, or the AC voltage it is set up to operate with.
I have no experience with Line Magnetic products, but as a search of past threads here will show that amp is owned and/or has been favorably commented on by some members here who are particularly well respected. Some of whom also use Tekton speakers.
Good luck. Regards,
-- Al