D Jackson/S Smith for J Allen??

[The U]

PPR IDP Kepper League

This guy is willing to give up D Jackson or S Smith(NYG) for J Allen. Should I do this trade? And which one? This is a keeper league...but I have to keep (1) from each position on defense, and can only keep 3 from offense, with only(2) from 1 position...
Starting lineups: 2 QB 3 RB 4 WR 2 TE 1 WR/TE FLEX, 3 DL 3 LB 3 DB

My Team:
McNabb Stafford Cassell
P Thomas, M Bell, Maroney, J Harrison, Forsett
B Marshall, Housh,Cotchery, Henderson, Britt
Lewis, Thomas Daniels
J Allen, T Brown, J Hall, S Rogers
Mayo, DJ Williams, S Cooper, T Howard
J Byrd, D Revis, B Meriweather, E Weddle

[MadDog36]

I'd take Djax for an IDP that's a steal.