A friend is looking for a currently available integrated-amp to drive a pair of L300.

The L300 is rated at 150watt continuously. I´ve been told to use an amp with at least 3db headroom, so we are talking 300watt.
But most integrated amps have just around 150wpc or even less.
For example Luxmann L509, Accuphase E480, Yamaha A-S3000 and so on... These are the biggest integrated-amps available of these brands, are these really short in power?
My friend strictly asks for an integrated amp, he doesn`t want a pre-amp and power-amp setup.

Actually I´m a little confused that all these heavy and expensive integrated-amps might not have enough power
Are these just for smaller speakers like bookshelf types?

Best regards,
Olaf