What is your budget? Sonic characteristics such as soundstage, detail, realism are determined by the specific design and also the type of tubes used in the circuit. Many great used tube pre's for sale.
Looks like the budget is around $700usd given the reference to the Vincent SA31. In that price range, options for decent new tube preamps are a little limited but in addition to the Freya suggested above, I’d add Mapletree Audio preamp. Its a two chassis design with separate power supply tube stage. If used is also an option, an older CJ PV series unit should work as well.
The Freya uses 4 6SN7GTBs or equivalent, and with remote switching between 3 modes (passive, FET, and tube), balanced and single ended ins and outs, and an accurate low distortion 128 step relay attenuator, there remains nothing like it anywhere.
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