While many people will try to always go for the newest or fastest boards - and even overclocking, there are many other times, particularly in audio applications where circuit noise and RF are what you need to avoid. The Pi has long been criticised for the way it shares its Ethernet port with the onboard USB port and the extra USB ports on most Pi's are noisy as implemented as a hub, not individual channels. This is where the Model 3A scores massively. By ditching the noisy Pi's Ethernet implementation along with the unnecessary extra USB ports, you get a board that is very, very quiet from the RF standpoint - ideal for hifi audio HAT's. Add in the lower current draw and you have the ideal Pi for high definition audio. Fabricate a simple HAT-sized screening plate mounted from 2mm copper like I did and you place a virtual Faraday cage screen for your HAT, killing any Pi circuit noise stone dead. Perfect! Forget the 3B and faster but noisy 4, get this and take a giant step on your journey towards audio utopia!