As others have said, the A5's are very smooth and will apear dull with inappropriate partnering.
I have a pair and they work wonderfully with an otherwise all Naim system(NDX Streamer/NAC 282 Pre-amp/Hicap DR/NAP200 Power Amp). They are serving me well and have responded well to each upgrade. I have used them with lower down the (Naim) range equipment and they still sounded good.
These speakers are not rockers though, if you want excitement look elsewhere, but for my ears they have quite a bit of magic with Jazz/Blues and orchestral music where the scale they have is surprising. Real instruments sound very real and they do well on vocals due to an excellent, smooth midrange. They will rock when provoked, but this is not their strength in my opinion.
Ensure you try at home with your chosen amplifier, they have a tendency to boom, this can be minimised with positioning but I have found as I have moved up the Naim ladder the partnering equipment helps with this, bringing them under control as they need to be kept under a tight leash.
Richard