Experience in ABAP OO and heavy background processing?

Hi,

we're planning to develop a new application with a (very) high part of background processing. We plan to use the ABAP OO. We also want to make a good OO-Design (with many SETTER and GETTER methods and so on). I'm afraid we will get a lot of "program to program" communication and we will atomize our application. Also it's sounds to me like a conflict with the stuff from the Performance-course BC490.

Has anybody experience with ABAP 00 and applications that normally designed for a "number cruncher"?

Thanks and regards,

Stefan