I have been using Active Captain for about 5 years, long before Garmin purchased it. The updates to the ports information is phenomenal and hopefully Garmin continues to make it available to non Garmin owners. That being said, when I bought my 37/40 PC it had an older Simrad unit that was not functional. I looked at all of the current models and there were features of each that I liked (Furuno, Garmin, Raymarine and Simrad/B&G/Lowrance). I wound up choosing the Raymarine ES 12" model as it met my needs. The unit was remanufactured, so I saved some $$$ on top of it. The software is upgradeable to LightHouse 3, which is important as that is the software that the AXIOM units use. I will add Raymarine's Doppler Radar sometime in the next couple of years.
No manufacturer is perfect and most suffer from obsolecense issues, including Garmin. The only manufacturer that supports their models for more than 5 years is Furuno. That being said, my boat is 17 years old and I cannot see buying the latest/greatest when one generation old will do at substantial savings.