I use an HF Packer on many of my activations and find it excellent. The kits seem to be sold at near cost-price and are not always available. However, K5OOR has jusr announced that they are in stock again. See:
With the current exchange rate they are excellent value-for-money in my view. A really neat feature is the internal 12-24v SMPS which means the amplifier runs at full output power right down to the lowest voltage of a SLAB.
My amplifier delivers 35-45W on most bands although the output drops off significantly above 21MHz.
PS I’m not on commission!