I'd probably avoid Pagham as well to be honest, played them a few times and they're not a very friendly bunch to play against on or off the field! If you don't mind the travel and it does depend on where you are actually based near Chi. Are you in Chichester or are you more outskirts if you don't mind me asking, likewise are you looking at Saturday league stuff, Sundays or both?
That area i would agree and say West Wittering as i know one of the players there well, he lives in Worthing like i do but that is his home club so he still plays there despite the journey for a home game! They are a good bunch and have done well over the years to progress to where they are as a club. Their 1's got promoted last season so are now Sussex Div 4 West, which is a decent level now. Sadly Sussex cricket in general is in the pits in terms of quality i'm afraid just like the county side.
Other options would be Stirlands, Selsey in that area or heading more Bognor way there is Bognor, but they just got promoted to the Prem this year, Eastergate or Middleton. Middleton are quite elite as a club in general so if your wallet balance matters give them a miss too! Failing that you also have Arundel as mentioned which isn't too far away or you could even go more Worthing based and look at Goring or East Preston as options.