Sophos XG, any recommendations? And some questions.

Hey guys!

I'm interested in replacing our Sonicwall with an XG. I'm not familiar with Sophos and just have a few newbie questions. Note: I don't have an IT background, but was able to figure out how to configure our Sonicwall NSA220W and previously a Fortigate 60D and 40C.

1. As I said, we are currently using a Sonicwall NSA220W with no performance issues using Via App Rules Content Filtering, Antivirus and Intrusion Protection (though we did have issues with Zone based content filtering.) Specs-wise the XG 105W looks identical (and more) to the NSA220W minus the 7 Gbe ports. Our office has 50 employees and around 30 concurrent internet users on average at a time. We only do browsing and email and most non-business related sites are blocked. As such, we don't really need a high bandwidth. We actually just use a 30/30mbps fiber line and 2 dsl that are 15/1mbps and 11/1mbps for backups. Would the XG 105W work for our setup https://1921681254.mx/ ? I was also thinking about the XG 115W.

2. The 105/115 has 4 ports and we have 3 internet connections here at the office, is it possible to assign 3 WAN and load-balance/failover between them? Essentially I'm just wondering if I can reassign the DMZ port to a WAN port similar to what I did with our Sonicwall.

3. I'm assuming it's possible to route a lan host ip to a specific wan? I'm routing our CCTV DVR feeds to one of our backup dsl lines.

4. Can you recommend an online reseller aside from Amazon?

Thank you in advance for any replies.