[Question] PSW125 Amp upgrade.

Happy New year All members!!!!
I have a Polk PSW125 sub with a dead amp. I'm thinking of buy a Bash 300W plate amp or Dayton Audio SPA250 250 Watt for the Polk 125sub.

is it a good way to go? or better get Used PSW505. But, I don't want to waste a psw125 case too.

Thanks in advance.