I only have space to use two enlargers (both Beseler M series of different vintages). I have my Durst M605 and F30 packed away. I'd probably keep the 45 and then choose between the 23C and the baby Durst based on future space/format needs. This assumes that the enlargers are complete and do not have any special wish lists for obscure carriers or condensers. That is where the Beselers score in N.America - they are ubiquitous.