Have not (sadly) gotten around for swapping tips, using the stock ones right now and they do an okay job but not great.
The choice of cable was a cheapish MMCX to 2.5MM from AliExpress for testing if it was worth upgrading further.
I am no EQ expert, have played a little on my PowerDac V2 - but actually think they sound decent out of the box.
They are my first open back planar IEM too, as there are not many too choose from
Been a over-ear headphone guy always, so this together with Shuoer Tape Pro was my first real IEM purchase.