Most of the current old-fashion high-end pre-amps deliver a lot of inputs but they costs easily multiple modulo 10k euro, like the Mark Levinson 626.
For me there is big difference between the digital and analog domain. Digital is the mid-end serious able to compete with the high-end. For analog items you still need to invest a lot because mid-end is not on the level of high-end.
Therefor last year I decided to try the Pre90 ending with a very positive experience and later I bought the D900 with even a bigger possibtie experience (only the D900 pre-amp scores very bad). And now I will try the Pre900 and expect again a positive result. Financially spoken the costs are very limited compared to the old-fashion high-end.
The support is also good: I reported a smal problem with the D900 and just got a new one which solved the issiue.
I think that Topping like to make clear that the Chineze are also able to compete with the old-fashion famous high-end brands.
You can easily find all kind of reviews, this is one of my favourites: and as you can see you need also solid power and cabels and audio cabinet: