Today I threw out a Storm iii and a Stadium iii.
If the drivers are still good AND you can retrieve, you can remove the amps, fabricate a filler [or just add external connectors] you can use a 2ch class D* and DSP to blow the doors off the REL amplification.
Ported speakers are sub-optimal in many areas: phase coherence, impedance, port huffing... I'm not sure I ever heard a pair I liked.
[* I have a 150W NuPrime ST-10 listed on US Audio Mart that I used for woofer amp in my triamped mains. Other amp options abound.]