Pushing a Mac to the limit?

You're fine. You don't even have 4 usb devices or do you?

And speakers, monitor, hard drive, and printer and generally externally powered.

And not sure what you mean by maxed out? # of devices?

I'm sure you could add quite a few more and be fine. Depends on whether they need to be powered via USB or not. And whether you need to use them simultaneously.

 

my 24" imac has:

-usb 500 Gb hard drive directly to mac
-keyboard directly to mac
-mouse to keyboard
-ipod to keyboard
-usb hub directly to mac
-canon colour printer to hub
-brother laser printer to hub
- external hard drive 250 GB to mac
-headphone into mini jack output
-FW 800 has a 1 TB hard drive plugged into him.
-FW 400 the DV camera is connected to that
-Ethernet
-an extra screen, not really spectacular

so every port, except for the line-in, is filled.

 

My PPC G5 has

two monitors on one gfx card
4 port hub powering the keyboard, mouse, iPod
usb ports on my formac monitor run my webcam, and my card reader,

not much but i would think you'd need a serious lot to cripple a macs performance

 

Mac Mini powering the following:

(2) 22" Monitors
BT Keyboard
BT Mouse
USB Printer/Scanner
USB HD
Speakers
iTunes Streaming to my Living Room

All while running:
CS3 Creative Suite
Safari

Never had any issues.

 

you run the entire suite at the same time :O