I have to admit to buying a couple of basses before just for their looks. That was the case with my EB2C which was hands-down the best looking bass I have ever owned, but I never liked its sound, and my Gretsch 6070 which I bought without even bothering to plug in, and turned out to be a great sounding instrument.
As for the Orfeus, I have a spare SD Hot Rails pickup, if the original pickups turn out sounding bad, I'll hide modern pickups under the Orfeus covers. It's a hollowbody so no drilling will be involved. While I'm at it I'll probably install new pots. I've done this once on an old ES335 - the whole harness goes through the f-hole.