If your happy with the FH7 stick with them, if really interested in Solaris try to audition them or purchase from a returnable source. Solaris are technically better, equally they are also on the large side for some. Owning CF Andromeda myself, I would say if you can purchase without concern go ahead, if not look elsewhere. One of my favourite IEM's is the Dunu DK3001 Pro due to the comfort and sound signature, considering the new Dunu SA 6. As your questioning the price of Solaris I think that also answers your own question.
As ever audio gear is very much a game of diminishing returns where one frequently pays significantly more for ever smaller gains. If I was to spend deeper I look to Unique Melody MEST that said sometimes it's just good to be satisfied and enjoy the music for what it is
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