AutoCad on Parallels

I have recently made the transition over from a PC to a Mac for designing in our office. While for the most part the program seems to be running seamlessly there are a few minor issues I am trying to get resolved. I am hoping that a discussion here will help alleviate some of those items.

- At times the magic mouse and cursor in autocad seem to run somewhat slow and choppy. I have seen on other threads that people have taken certain actions such as lowering the memory on the VM. Is that the best solution or are there any others that have proven to be more successful?

- When running Irrigation FX in AutoCa when I pull up specific tool bars the windows are very, very small. One solution that was presented was adjusting the screen resolution. Is there a resolution most optimal for running Cad via parallels through a mac which would help solve this issue?

Any solutions or suggestions would be very appreciated.

Thanks,