Funnily enough, this is one instance where price follows the technicalities of the IEM's in question. The Andromeda is one of the best tuned monitors I've ever heard. I'd even rate it above the likes of the RE2000. It can be source dependent though, and its sensitivity makes it prone to hiss, and nature of the crossovers with the BAs can affect frequency response if from higher impedance source. The Andromeda (for me personally) does have slight comfort issues (would love to see it in a rounded shell). I've often toyed with the idea of selling a lot of my other personally owned monitors, and just buying a pair of Andros, and buffing (rounding) the edges off. If Ken ever released the Andro tonality in a slightly different shell, they'd be very close to end game for me. They are pretty close to what Iw ould call reference (this may not suit everyone). The Big Dipper (with tuning options) satisfies my personal preferences for fit/comfort, speed and precision, layering and imaging, and ability to tune the sound to my liking. It is more coloured than the Andro (especially through the mid-range), but I tend to like a well tuned mid-forward IEM, and I have no issues with a touch of added brightness or coolness. I also tend to favour BA's for their speed overall, and tonality with the mids and highs. Either it or the U10 is more often than not my daily drivers. I must stress though - the Dipper is my preference, and may not suit others. The A5 is an improvement (IMO) on the A4 mainly to do with fit and comfort. I think there is enough variety in the tonality (filters) to suit most tastes, and you can further adjust if you don't mind experimenting with a bit of acoustic foam. For the price point, they sit in a good space. I'd take the A5 over a monitor like the Shure SE535, and personally I prefer its tonal balance (red filter) even to the likes of the FLC8S (again personal preference). But ultimately the A5 won't replace my other monitors - and especially not the Dipper or U10. For close to reference I have my Alclair Curve. Not sure if that helps. Its going to depend ultimately on where your budget allows you to go.