we  priced a white planter..    and got  3  university studies on planters

Minnisota, Illionios, and Iowa state...

3 differnt  planters had the "BEST"  accruacy..  from running this planter 2 days now I can tell you for sure  100%  that  on any  "air-vaccum" system its  all in what seed size you chose and  the settings you set it on..

the old finger system  ( WE USE TO HAVE)  just needed to be tooned up once in a while is all..  so I cast my vote to the fingers 

LOL

back here in IN  4row planters are selling for  (SORRY)   $500 or less... 
neighbor ( former farm progress show host)  sold an old 8rw  for $1000