Well I can't say that I absolutely agree with you about ESET being the best, but I too really like their product line. I have in the past used their online scanner as a temporary way to do a quick scan on a system to see if there is further need for malware analysis.
Commercial level AV solutions are not in the same boat as a residential consumer product you would buy and install on mom and dads PC. Corporate level AV solutions provide options that most small businesses, and residential consumers won't ever need. Pretty much every IT department I have worked for in the past has had a Security department, and all day these people are tweaking, adjusting, monitoring, and fixing holes in their network infrastructure to prevent intrusions. Mom and dad prevent intrusions by not surfing bad sites, and relying on free services like Adblock Plus, or free updates from SpywareBlaster to help protect themselves. They don't have a team of educated analysts and engineers defending their network 24/7.
So in my opinion, unless you're talking about an ESET product that is designed for corporate entities (http://www.eset.com/us/business/products/solutions/secure-enterprise/
), you're actually just referring to the products you could pick-up at a Best Buy and install on your home system or small business. Those are commercial products in that they are being sold to the public, but I bet you're referring to the big companies like Symantec, McAfee, etc. Those names have been synonymous for a very long time now with powerful anti-virus solutions. They still are, just like any anti-virus product, if properly managed, and surfing the web safely, you really won't have problems the majority of the time. They however have been around for quite some time, and they have their good days and bad days just like any other AV company. Although the days when your AV product flags a legitimate OS file and deletes in, bringing about network wide BSOD's, yeah..that's a baad day!
I would suggest hitting up a few comparison sites to really get a better understanding of the competition in the market. No one has a 100% guarantee, but some products are currently performing better than others.
For example: ESET was the third from the bottom on File Detection tests back in March (a horrible position to have), but had ok Real World Protection tests in May, coming in just barely above McAfee...http://www.av-comparatives.org/dynamic-tests/
In my opinion, they're only worth their salt when they're protecting you. Regardless of what product you use, the best protection methods in my opinion are educating your customers in safe web surfing habits, and having multiple layers of overlapping defense for those that don't want to be bothered with the headache of managing it.
Malware changes rapidly, and we will always be one step behind, if not more. Bettering their detection processes would be great, but it's kinda hard to proactively block something that doesn't exist today, and is designed to defeat your brand new shiny system tomorrow.
Most of the big contenders in the AV industry have "low footprint" products right now. It's becoming a pretty common thing these days in my opinion.
d7 is a very robust Malware removal tool, and to be quite honest there are few infections that can fight against it right now. The only one's that are a bit rough to crack into and get open are the newer variants of the FBI Ransomware infections that hijack your screen even in safe-mode. Those are the most fun resolving remotely.