Get Them!!
I would be VERY surprised if you regret getting the A4s. I think your worst case scenario would be 'These are very capable IEMs' and your best case will be 'Holy Sh!t!! I can't believe I held off on buying these!'
But it depends what you're used to, I think. Looking at your IEM line up, the only ones I have heard are the Havis. When I first got my Havis (and added the Spiral Dot) I would have rated them about 7/10 - very happy with them. Over a short period of time, a little less happy. The A4s, for me, are 10/10 and they relegate the Havis to a 2 or 3 - while I am sure there are other IEMs around (costing more) which can outperform the A4s, for me they are an absolute no-brainer at their price.
See if you can find anyone reasonably near you to audition them. But if you like the 'hawks, I think you will find a tuning you LOVE on these. Not saying they are related sonically - just re-emphasising what I have already said about owning both.
If you get to try them (or buy them) DO let me know how you get on
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