I've been considering upgrading my IEMs recently since I spend so much time at work with them. I have been wondering if it is worth the money to go for custom IEMs. I have Westone 3 and I am considering two IEMs that are about the same price where one is a higher model universal and the other is a lower model custom. Namely Noble 5 vs Noble 4 custom. What is everyone's opinions on which would be a better choice? Even better if someone has some experience related this kind of choice.
If anyone wants to comment on my specific situation, my source is an RWAK100 and I listen to a lot of pop and metal with a little classical and electronic. I will mostly use them in the office and commuting on trains/planes (less than office use).
As always, thanks in advance for your input.