I’ve always found demos at HiFi dealers to be very unscientific. The whole process of comparing kit, listening intentently, repeating the same tracks over and over again trying to discern different characteristics and making a choice just ends up being stressful. The room is always so different, the use of expensive esoteric cables and power supplies, just unrealistic and over the top. This is especially true when you are just say upgrading an amp or CD player to add to your system. Conversely, I think reading reviews carefully and understanding the type of sound you want is more beneficial. Then you can order online and trade in your own kit by part exchange, plus because you have bought online, returns and refunds are a guarantee. However, the only way you will ever know if you really like a piece of kit or complete system is by ownership. Living with the purchases for a few months and getting used to the sound is the true test. Then you will either become increasingly disappointed and frustrated by what you have bought, or grow to like and enjoy it more, the longer you own it. Hopefully if the latter occurs, you will then lose all thoughts of upgrade itus and reach some kind of contentment, or art least inertia will set in. These thoughts are from someone who started in 1982.