Problems with 2 winter and 2 Radial All Seasons?

[Aric11]

I have another question in my continued quest for used tires for my used truck lol. I have the opportunity to purchase 2 sets of 2 tires for next to nothing. 2 are all reason radials, and two are winter. They are all 235 75 R15 which is exactly what I am looking for. But aside from the winter tires having a harder wear put on them while driving year round, is there any potentially major problems I need to worry about by having two sets of like sized of different styles on my truck? Also, which set should I run on the front or back? I was thinking the winters on the back and all seasons on the front. Thanks.