English speakers-Question Need Help!

[silver50]

I have been looking for an E65er and this week am travelling 300 miles to a BMW group Auction.There are 3 E65's I am interested in.But I have a question about the Hi-Fi systems!

The 2003 BMW sales brouchure says ALL models have "Hi-Fi Speaker system"as standard equipment but then goes on to say(contradicting itself)that it is optional for the 730i's and 730d's(Inc SE).

BMW parts database  www.realoem.com only lists two different amplifiers for the E65.Proffessional DSP(Logic 7)and one other.Also two options for front door speakers-but they have the same part numbers!!!

BASICALLY MY QUESTION IS THIS-

Is there actually 3 levels of speaker system/amplifier!

-Non Hi-Fi Speaker system
-With Optional Hi-Fi speaker system
-Logic 7 Professional

Do you think all E65's have the Bass speakers under the front seats active?
I started of my search wanting only Logic 7 but was hapy with the system I heard in a 2002 735iSE.But I do not want poor speakers and very little Bass!Please help if you can,Many thanks!