One piece vs. two piece rims???

I'm looking at ordering some American Racing Torq Thrust II's from JEGS for my Galaxie. I see that there is the 505 series which is a two piece rim and the 515 series which is a one piece rim. Is there a benefit to one vs. the other? The 2 piece rims are slightly more expensive. I don't mind spending the extra money if it's a better quality rim, just trying to figure out if in fact better to go with the 2 piece rim.

 

Anyone?

 

I would suggest calling the Jegs customer ***istance. They should be able to help you.