Nice! Do you still have the E23? What a classic.Style 37's are my favorite BMW wheel by far, they look good on damn near any 5, 6 or 7 series from the 80's to the early 00's (Don't like them on 3's, it's a big car wheel)
I had e38 offset style 37's on my e23 and loved them. I'd run them on the M5 if it didn't make the car look like a 540i.
If I pick up a e39 beater I'll probably get another used set.