I have the Dynavin currently installed and entirely unhappy with it. I've been pointing fingers at all my other gear trying to find the source of crappy sound (stinger HPM 3 RCA's, Alpine Processor, Alpine PDX 2nd gen Amps, Boston Pro speakers)...
I tested using a laptop direct into the Alpine processor through the system and immediately, without any tweaking, the sound was full and rich like it should always have been. So I am getting rid of the Dynavin.
My HVAC controls came fitted in the lower dash anyway as I had the double din cassette/tv from factory.
I do want nav, but honestly I'd pay over $1000 for a good touchscreen unit with decent SQ output so long as it doesn't require cutting up my A/C ducts and does not involve a flimsy flip up design
I have just found that there are several of the cheaper brands re-badging this same unit above: Boss, Power Acoustik, Farenheit, Precision Power, Soundstream... So I'm pretty sure its another gimmick unit with crappy performance.
I know Soundstream and Precision Power were never leading the industry in source units, but they did have a reputable brand name for amplifiers and speakers, so I cannot understand why they would dare put their name on something if it was comparable quality to a Dynavin. That wouldn't be a smart move... so I'm deterred and intrigued at the same time