DIY is a good way to go, IMO. The kits are nice, but the boxes are kind of expensive if you can make those yourself.
The
250w Plate Amp is cheap power. A few options with thr driver,
Dayton DVC series, Titanic series, Adire Audio Shiva/Tempest, or Lambda PB will all be excellent and I think plenty of bump for your rump.
Aaron