Phono Stages with External Power Supplies...Worth It?


I basically know what phono stage I am buying (Odyssey Suspiro) but what I can't decide on is whether getting the better version with the external power supply is worth the extra money (Reference).

My current phono is MM only (Lounge LCR MKIII) so I've only ever ran MM carts but I think eventually I would like to get into MC. So how much difference can it make? for 40% more money is it that much better ($1200 vs $1950)
gochurchgo
I too must be of the older group who thinks:
Preamp = phono and line
Line stage = line only
Phono amp = phono only
Passive preamp = evil box of magic
Fundamentally speaking, separating the processing of the weakest signal from the EMI of an AC power supply is highly desired. Go in that direction if you can. 
Let me know what you would want for the  Lounge LCR MKIII if you want to sell it.