MFB Dominion 1
MFB have been doing the semi-modular thing for quite a while now, although all but one are now discontinued. But heorically replaced with their excellent Dominion 1 - which we reviewed (and loved it). The Dominion 1 has a lot of patch points making it one of the more fully featured semi modulars we know of.
But this does come at a price, it's also one of the most expensive listed here, but honestly it's a beast of a synth.
£1003/€1359