It depends on the compressor model you have:
For example, the Viair450C and their 200 PSI Plug-N-Play 38034 are specified at a maximum current of 23 Amps so a 50 Amp / 600 Watt power supply like the one you pictured should be more than adequate. However, if the cost isn't significantly higher, a 1000 Watt would certainly work and would maybe just run a little cooler (rated at 83 Amps).
Dave