There is some good information here - this comparison test has been done by an "independent" source - NOT sponsored by either company :-
http://www.fishtec.co.za/downimaging...20downscan.htm
Date: 13 January 2010
Time: 11h00
Venue: Inanda Dam Kwa-Zulu Natal South Africa
Test: Lowrance HDS8 with LSS-1 v.s Humminbird 1197cxSI with Hi-Def Side Imaging with software 4.750 (Down Imaging)
Setup: Both transducers are mounted side by side on the starboard side of the transom
Conclusion: The Humminbird definitely performs better in the 455kHz range than the 800kHz, but still lacks somewhat when compared to the Lowrance LSS-1.
I have decided to go with the Lowrance HDS8 with LSS-1 on our new Haines - hope to fit it in the next few weeks
Regards Scotto