I think both brands are going to work just fine. (I know you didn’t want to go CS, but I am going to comment anyway.) I understand Lowrance CS was less than desirable for some, but I have never had an issue that was not resolved in a timely fashion. It may be that I never had a reason to call when the CS was “bad,” nonetheless, CS was not an issue for me when making my decision. Also, there are reports that CS has improved dramatically as of late…Lowrance figured out there was a perceived problem.
To me, the decision was based on 3 things 1. Ease of use. I don’t think either HB nor Lowrance are particularly difficult to use. I was able to maneuver around in both. I had had Lowrance (3 units) for many years and the familiarity with them was a plus. 2. Side Imaging. Not entirely sure how to interpret your comment on the SI. Are you not considering the SI in either unit or just the Lowrance due to it being an add-on? If you are not considering SI at all, I would suggest reconsidering that decision. If you are just delaying the SI if Lowrance, you should take into consideration the number of units you plan to eventually have. If you only plan to have 1 unit in the boat, the HB may be less expensive as the SI in included. If you plan to ever have more than 1 unit, the cost factor may swing in Lowrance’s favor. For me, I knew I would have 2 units. Only having to buy the SI module “once” was attractive. 3. Pixel count. If you are looking at the HB 7/8 series vs HDS 5/7. The pixel count will favor HB. The pixel count is much closer in the HB 9 vs HDS 8 and is equal in the HB 11 vs HDS 10. Only you can decide how much difference there really is. Going strictly on pixel count, the HB has the advantage overall, but the screen shape may change your perception of that “advantage” to an extent.
I doubt that you will be disappointed in either product. I ultimately chose HDS, but my father owns HB. After seeing my HDS 8, 7, and Structure Scan in action, he was somewhat envious. His HB 9 is still a good product though.