Jay - I can answer some of this but not all:
In 8x42/10x42 configuration the Aurora BGA is the top model in our range followed by the DBA Oasis, Imagic BGA SE, Verano HD, HR WP, Countryman BGA, Traveller, Imagic TGA, Discovery WP, Trailfinder 3 and Oregon
In compacts, the DBA Oasis is at the top followed by the BGA T PC, Verano, Aspheric LE, HR WP, Taiga, Imia, Savanna 54, Trailfinder 3, Adventurer and Vega.
In scopes, the top of the line is the HR series (HR 80 and HR 66) followed by ES 80 and ES 100, GS 665 and GS 52, IS 60 ED, IS 60, MM2 52 ED and MM2 52.
In eyepieces the SDL v2 is our best and is tuned optically to match the HR scopes. Best selling and one step down from SDL are the HDF range followed by HR and then IS.
Our products are manufactured in either China or Japan. In binos, more or less everything over $250 retail is Japan made i.e. Discovery, Trailfinder and Oregon are China-made, all others are Japan-made. The scopes are all Japan made except for the IS models which are Japan-designed, China made.
The optical systems typically all come from either Japanese factories or are designed by our Japanese optical engineering partners and made in China.
I can't really comment objectively on your last question so will leave others to pass judgement
Cheers, Pete