When I first got my sds100 I was put off by the audio. As things developed I only use the SDS radios at home now as I use Mot gear for mobile and portable use on my local P2 simulcast system and that's because of the volume punch I need in the car or portable application.
I actually use very old Radio Shack communication speakers, for those who remember, the square ones, not the newer rounded ones.
I have gotten to the point that I don't even use the apx 7000 on my home set up anymore, I actually find the SDS radios to have Superior modulation on my local system. I don't need that volume punch I get from the Motorola while I'm in the house. I guess you get used to it but I prefer the SDS audio in my home setup now, it's easier to understand.
Go figure, LOL.