The Slingy aluminums are like Acros and I think it really comes down to the question of if you're a Ludwig guy or Slingy guy. I happen to own a 62 aluminum Slingy (6 lug) and a 63 Acro (8 lug) and like them both! Both have COB hoops, but the Slingy is all original...down to the heads and wires! Even got the original suitcase with that one. I paid a lot less for the Slingy than I did for the Acro...which seems to be the trend.
[IMG]http://i1130.photobucket.com/albums/m530/ElMoonlightDrummer/Slingerland%20Snare/IMG00486-20110620-1356.jpg[/IMG]
[IMG]http://i1130.photobucket.com/albums/m530/ElMoonlightDrummer/63%20Ludwig/63acro.jpg[/IMG]