Here is my progession: Pioneer Andrew Jones > Polk Signature > Arendal 1961
Really, they shouldn’t even be compared in the same category. The Andrew Jones speakers are fine budget speakers in their own right, but if we’re talking about Arendal now, that’s a whole different world. Everything from power handling, clarity, speed and of course physical appearance of the speakers is going to be way better than what you have now. I enthusiastically recommend the 1961 series!
p.s. I would personally go with a high-quality class-D amp from Nord or Apollon (or Buckeye, if you’re in the US) for around the same price as an XPA-5, but that’s entirely personal preference.