Noisy spin cycle on washing machine

I have had 2 machines in 2 years (recent one blew up for different reasons). However I have followed the installation to the letter including removing the transit bolts, ensuring the machine is solid on its base and level at all sides using a spirit level, ensuring that the load is correct in weight and distribution, that there is no movement ensuring the feet are solid, the floor is of solid construction (no wood carpets or even lino). However I had to hold the machine down to stop the vibration and incredible noise above 900 spin speed and even then when the spinis stopping it makes a temporary load noise as it reduces in speed.

I am at my tether as to what to do. I cannot weight it down with something on its top surel and it would look unsightly.

HELP!! PLEASE!!?