Speaker return or sell As New

I recently purchased 2 sets of speaker, on paper radically different.

1. The LRS from Magnepan 2. The Zu Audio Dirty Weekend.

I love rock music, from the classic bands to Metallica. I also listen to all music in smaller doses.

Simple AB testing with my ordinary ears, cheap cables and an unremarkable amplifier. Led me to prefer the LRS with a REL T7i subwoofer versus the Dirty Weekenders.

Having said that, 2 questions arise.

First, any suggestions to make the desicion better informed without at this moment buying a better amp or cables.

Amp is an Iota VX with the additional power amp.

Cables 12AWG un branded.

Streaming for now from Amazon Ultra HD for testing through a Bluetooth Aptx adapter.

I cannot afford to spend more money for now.

And the other question, do you think I should offer the Dirty Weekenders for sale "As New" since they are and give anyone who missed the recent sale, the chance of buying them. They have the Capacitors upgrade from Zu. Or simply return for the full refund they offer?

As ever, thanks for any input and advice!

Happy Holidays to all.

B.