(1) System
We recommend and sell Qolsys panels. The IQ Panel 2+ is the panel model in our system bundles.
The IQ Panel 4 is in a soft launch period right now, but I anticipate this would become the new system we sell. It is very similar to the IQ Panel 2+, with the same interface and overall look, with noticeably improved audio, and an optional sub/desktop stand for louder audio.
I don’t have an ETA for the IQ Panel 4 yet for our store, but I imagine shortly after Qolsys ramps up production it would be sold.
Here is a thread regarding the Edge panel.
If you have wireless DSC sensors (likely DSC 433Mhz, but we would need to know you sensor models to confirm) they could be used with the 433 Mhz version of the IQ Panel.
(2) System Power
Panels come with a plug in power supply. You can typically reuse the keypad wiring in the wall with the new power supply. You cannot power the panel off of the old alarm panel in the metal can. Only use the included plug in power supply.
Wiring instruction can be found on page 11 of the manual.
Whether you can reuse wiring will be based on the length of the cable and the gauge of the wiring, but it is very rare and would need a very long cable run for there to be no options. You can also double up wires to effectively increase the size of the cable.
(4) Existing Wired Doors and Windows
If you wish to reuse wired sensors, you can do so with a hardwired translator. Using the translator or replacing the sensors is a judgment call largely based on how much you like the existing sensors and how many you have. If you have a lot of wired sensors there is significant cost savings in reusing them. It also limits the number of future battery replacements, but that is probably a small concern.
Recessed wireless sensors will have some signaling impact from metal doors. If your doors are metal, I would recommend a surface contact, or reuse wired sensors.
IQ S-line and PowerG are two separate wireless transmission protocols. Here is another thread describing them.
Short answer, PowerG has a larger range and is more secure. Both IQ S-line and PowerG are encrypted but PowerG also uses Spread Spectrum Frequency Hopping for security.
(5) Front Door Camera / Doorbell
Surety is an Alarm.com dealer. Arlo is not a compatible line of cameras and I cannot provide advice for that.
Alarm.com compatible doorbell cameras are the Skybell VDB101/102, 105/106, and the ADC-VDB770, which is the newest model and the one I recommend.
It will not work with an intercom system, it is powered via a standard doorbell circuit transformer however, which you may have if you have a mechanical chime still.
All Alarm.com cameras require power application. There are no battery only models.