The guy needs game time and given his lack of fitness and the options Arsenal have in CM it seems unlikely he will feature a lot for him. Could be a good pick up for a few Premier League sides in fairness.
Apparently it will be either Palace or Bournemouth. I would rather Bournemouth to be honest, they play a good brand of football and even though they haven't had the best start to the season, I think they will improve.
I think any move would be good for Wilshere, his career has stagnated massively and a change of scenery could help him. Injuries have been the main contributor but if he gets over them there is a decent player in there.
I think Bournemouth makes more sense as I feel they are better set up to suit his style... Also Palace are so up and down in form and have lost some key players this summer. If I'm Wilshere I'm heading to the South coast.