Recommendation for individual shipping module

[scotch33]

Hi there,

 

I have a customer store where they have a number of different shipping needs.

 

The standard is simply a table rate which I have got working fine

 

The second is for large items which will be shipped seperately by another company - thus I need to use a per product cost

 

The third is for a number of large items shipped by a another company - here there is another table rate

 

I need the shop to work out what will ship in what way, and then calculate the full final shipping. I don't want to give customers options - the different shipping should be cumulative and automatic.

 

Can anyone recommend one(or a series) of the modules out there to do this sort of job

 

Thanks!