io know orion has been top dog in competitive audio for years, i am not farmiliar with re audio.
one thing i know is often companies have good parts and design but if they are smaller often have to charge more to make money.
so companies like fosgate or jl puts out units in the millions and can charge less dollars.
the biggest thing here is system and box design, making sure the sub you choose works well with the amp you use.
there are many great speaker and sub companies out there many will never get the respect they deserve.