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salad
Airhead
Other opinions are available but I think guitar amps are a good application for tubes and phono pre amps are not.
NAD do a decent basic one with MC and MM. Cambridge Audio do a few that are rated for sensible money.
I wouldn't bother looking at MC unless your total budget including a cartridge is around £1k.
MC works the same as MM once you've used a transformer to increase output from the first stage. The tube part of a pre will be after the initial amplification in the case of MM, then RIAA adjustment, then amplification to line level is where the tube will be.
Beyond the NAD and Cambridge audio level it's minimal gains in measurable electrical terms. In hi-fi terms who knows. Blacker blacks, wider soundstage etc. etc.