How to control my Mac from work (with a PC) or from my iPhone or iPad?

Is there a product that will enable full function ability, such as emailing, searching all directories, and running programs such as Quickbooks, Excel, Word, etc?

Which software program is the safest and most stable?
What will run from any of the aforementioned devices?

Hi

You can use TimBukTu to run the Mac from your PC, control it, work on anything on the Mac. Works very well.

http://www.netopia.com/software/products/tb2/index.html

You want an amazing device that can perform better than any device you known. You have to go to the Apple Corporation in order to find your device. I think the problem will be solved.

From the iPad there are numerous VNC apps. We use…

http://www.realvnc.com/products/ios/

If you are comfortable in the Terminal try the excellent Prompt…

http://itunes.apple.com/...07115?mt=8

If you host your Mac OS on cloud, then you can access it and all of the software installed on it at anytime and from anywhere via Internet.
http://www.myrealdata.com/cloud-computing.html