"REL is very cheaply made" is an opinion very few people share and I have a feeling it's just Johnk spewing garbage. Many people have chosen REL subs as a cost no option solution. For m particular room and system, the REL B2 has served me extremely well and it will for many years to come.
I would give every sub in your price range a fair shake. I did and it worked out for me.
I would give every sub in your price range a fair shake. I did and it worked out for me.