One Box vs Two

We have a model 530 box as well as a model 510 box at our company.
We will be moving to a model 700 series or model 800 series box sometime
this year.
For development work by our programmers, would you recommend having 1 box
and use partitioning or else
having 2 boxes using 1 for development work?
I tend to have the opinion that we only need 1 box for our company.
There is a big push in splitting our development process away from our
production environment.
I would like your feedback on this.
We are a manufacturing company with about 10 programmers on our AS/400.

Also, what type boxes or systems would you recommend for e-commerce type
applications?

Maybe a Model 270 system?

Thanks for your feedback.


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