When the Pre was released Shahin at Meitner told me it really elevated the performance of the MA3. But I suspect any number of high quality pre amps might be able to do so. Before you dismiss your current preamp, make sure you have fully bypassed the volume control on the MA3i and are sending max output voltage to your preamp by turning the MA3i to full volume - 100. Then adjust the volume level on your preamp to suit your listening preferences. Also, have you tried drving your amplifier directly from the MA3i? The output voltage from the MA3i's balanced and single ended outputs are much higher than that of the MA3. If the input voltage requirements of your amp is low enough you might be pleasantly surprised by the results you get from removing the preamp from the chain, particularly if your amp can accept a balanced signal from the MA3i and it's higher output voltage.😉