Rise! Rise from the grave I say!
Had a thought about this the other day, and was reminded of the thought by another thread.
Build your standard PAN with a high rating Commlink with a Program Carrier running Smoke and Mirrors and a Sleaze dongle and all that. Then, here we get into serious smack you in the face with a rule book territory. Run your Nixdorf Wireless off, but have it plugged into your Commlink Via UDP. The Agent on the Nixdorf has no access to the Matrix, but can still do a Matrix Perception check on the device it's plugged into via a UDP (your Commlink) and therefore still effectively monitor your PAN for extra Marks. It can only Send Message to the Device it's plugged into (your Commlink) but since you've formed your Persona with that device you should be good to go.
Oh.... why this matters. The Have a Agent Monitor your PAN thing's weakness is low Sleaze to resist Matrix Perception. And the Agent on the Nixdorf is never going to be very sneaky anyway because of the low rating of the Nixdorf. Your PAN is relatively easy to spot, but difficult to Hack. Now you can have both. As a Bonus it becomes well nigh impossible for an enemy hacker to ever even know you have an Agent monitoring your PAN, since the Agent is running Wireless off.
Probably RAW. Likely overkill. Apologies to the GMs that like to use hackers to mess with PCs gear.