For normal paintball use, I've never seen an advantage of BDU-type clothing, especially jackets, over jerseys/long-sleeved T-shirts.
Even most of the "tacticool" guys these days are switching to the long-sleeved Ts under their molle vests.
BDU pants are nice, though, especially when made of ripstop and having pockets for kneepad inserts.
I haven't been terribly impressed with the quality of Valken's clothing.
Great gloves, though.