First impressions of simply sitting in the Recaros (no drive time yet) is that they are very firm. Maybe they would be very comfy over a few hours, but I couldn't tell immediately (like you can with Swedish seats). I'm not a fan of huge bolsters, though I don't recall the ST2 seats being all that aggressive.
...has anyone here driven an ST over a long distance?
If you could live without them, an ST1 would be an even better buy. That car for ~23/24k sounds very appealing.