which is more musical? A REL or a SUMIKO subwoofer for two channel only?

Lak,

You did not tell me why you feel this way?

More thought and technology put into the REL yielding better sound.
Check out the explanations provided by REL on Youtube, see the "REL Acoustics How To"
Talk to any store that carries both SUMIKO and REL and ask them their opinion.
In addition to the above, the REL customer service is there 100% to assist if needed.

Hi Lak, may I ask what REL model are you using?
Hello AudioConnection, a Vandersteen 2W can be had for $350 cash, locally. Where’d it stand in performance as today’s standard, Are the 2w-Q and Sub-3 much more superior than the original 2w?

REL T/5i, REL T/9i, SUMIKO S.5, and S.10

NasamanA local 100 pound 2w for 350 with the correct latest high pass set correctly would be a great start.just make sure it was well cared for.you can pm me to attain the correct x over choice. Best JohnnyR