I believe oem offset is +45 so your best bet would be listening to what PhatRoyale is saying and go with the lower offset. Any significant reason as to why you are going with a 16x7 wheel are you planning on doing auto-x with your car or something to that nature because when most people upgrade wheels they tend to go with 17's or 18'sGet the +38.
The +50 might hit your suspension because the offset is too high.