Hello "." and welcome to EO and 40k.ca as C'tan man has said.
You have a very simple, yet effective list on your hands, and it looks like it could do fairly well in my opinion against most enemies. However, that being said, I think you should probably keep the Spyders since they give some anti-2+ save armour ability.
:: shrug ::
Just a suggestions.
And again welcome. If you have any questions about anything on EO, please contact me on MSN or PM. Email is in my profile.