Firstly, I would suggest you decide on what technology you prefer Valve/Tube or Solid state. Then select from a short list of each as the two technologies will sound completely different.
If you are looking at pre-amps like the LS28 then don't expect the Mola Mola to even get close...
I've only ever had one preamp and that has been a valve preamplifier so am very comfortable with the sound. However I've tried to keep an open mind in terms of ss, after all lots of systems run them and I assume the owners are happy.
There's an ex display LS28se here:
https://www.hificorner.co.uk/shop/outlet-save/audio research ls28se line-stage pre amplifier (ex display).html
The Mola Mola Makua is optimally to be considered with its optional digital module as a pre/streamer/DAC, at which point it competes against a dCs Bartok. Completely different to an AR Pre product as Graham has highlighted.
The ex dem one is still £9k so way over budget
Good call. Again, only ever heard good things.
did i hear you say ?
I don't want something from a very 'niche' outfit !!!
Oh, I didn't realise it was a niche brand. There are plenty of online reviews and often features in articles about best preamps.... which led me to believe it was more mainstream. They also have a number of authorised dealers whereas "niche" products often have no reviews, their reputation is usually from forum word of mouth.
But you're right, it's not exactly a mainstream brand!