iceman, i got the sansui AU-alpha707. pang palubag loob dahil nakasira nanaman ako nung luxman. i'm very happy with this amp; i took pictures of it last night, will post later.
based on the sansui.us website, you should avoid models made in the early 80's because that's when the company had labor and currency exchange problems. true enough, those models na may suffix na F at G ay naiipon lang sa pier. i got one of the alpha series which was the company's attempt at regaining market share to make up for the poor models. the website said that the X and alpha models were manufactured at a loss. you will immediately notice the difference in quality of the parts.
i got this in the store with the stacked speakers. before we tested the unit, i asked them to open up the casing. this one has the biggest EI transformer and capacitors that ive ever seen. bigger than the sony ES i got from the same store. the 2 caps were almost the size of beer cans!!
i checked the AU-707X model in another store. that one had a huge toroidal transformer and 4 smaller caps. but unfortunately it was defective (i never buy without auditioning it).
the sound has a very good balance -- slightly weightier bass than the sony ES/kenwood THX and some shades of the refinement of the Luxman hybrid. the luxman is my favorite amp because the background is so quiet and the sound is so clean/clear. the sansui approaches the luxman's clarity but adds the bass weight that's missing in the luxman. this is just my initial impression, so it could still change after i do more listening. i always get excited when i get something new.