I don't know about the Variations, but keep in mind that a good bass boost can be a good thing in some cases (as long as it is tasteful and not overly done). If a set of IEMs is analytical by nature, a good bass boost will also help to make them more musical (and not boring sounding), and yet retain their analytical nature also.
One of the reasons I love the IT series from iBasso is that the bass, while boosted a bit, is more linear (except the IT01 which is almost a bass cannon). This means that in tracks that call for heavy bass, you hear it all, but in ones that do not, it is not over emphasized. There is also not a huge mid-bass hump that creates the mids bass bleed. I can't compare the IT01x with the Variations as I have not heard them, but I would submit that the IT01x is the little brother of the IT07 with less refinement that you would get from the IT07 (which IS a kilobuck IEM in sonic quality, just not in price). I personally kept the IT01s and sent the IT01x back because the sonic differences to my ears was not enough to justify the price difference that I was able to obtain for the IT01s (IT01s WAS $200, but I got them for $120).
The other thing I have always like about iBasso products is that they are very competitive in their pricing. They create devices/items that compete with other TOTL stuff but not at an exorbitant price range like most other manufacturers do. (not to start a flame war here but) Take the A&K SP2000 for instance. It is somewhere around $2400. I would submit that the DX300 ($1100) is better in every way; power output, screen, speed of OS, features, sound, for much less money (IMHO).
But at the end of the day, I think that it will come down to how your ears hear things. The Variations could be the one, or the Fiio FH5, or the iBasso series. And, you won't really know until you put them into your ears really. BUT... I would probably put any of them up as being very good for your money IMO. For what you are looking for I don't think you can go wrong unless one of those sets just happens to not synergize well with the chain you currently have. Keep in mind that (while I am not a fanboy it might appear so) I use iBasso DAPs (DX300 and DX160) for all my music needs, and the iBasso IEMs synergize very well with them. I find no reviews that say any of those DON'T synergize well with most DAC/amps, but it IS possible. This holds true for any IEM that you have to rely on others to tell you how they sound.