I'd go the other way. Pick whatever big name you want - Avigilon, Hikvision, Axis, Milestone, Dahua, Exacq, Samsung, etc., etc.
As an integrator, though, I'd go full force in doing everything I can to make it clear to customers how my technical team is superior - whether that it is certification or 'thought leadership' or local education or custom development, etc.
The reason being is that the manufacturer market is so fragile right now and I am not sure anyone can definitively say where it is going, so putting one's faith / stake in any manufacturer is quite risky.
Plus, as more products become directly available, much better to have users be confident in your team's unique (local) talents to deliver successful solutions than to be linked to any manufacturer.
It's funny you mention Luxriot - that's what we use for our installations where they don't need all the bells and whistles. I can do around 50-60 cameras per server pretty comfortably.
We choose not to use a true end-to-end solution in our particular market space simply because it exceeds our clients needs for the price. If the pricing on an Avigilon or similar system were more reasonable, I would have no problem switching my clients over to a more feature-rich software for a reasonable price increase. What my clients refuse to do is pay $10,000 for the initial software fee and then be expected to dish out $2,500 (or some % of the initial cost) annual fee to keep the software up to date.
That being said, if I had to choose (and for one client, we did) it would be Milestone/Axis, although I don't know if you can truly call them end-to-end despite both being owned by Canon. I'm not the biggest fan of the software, but it gets the job done on a widely distributed network. We have yet to have a failure in 4 years and the client is really happy with what he's getting.
To be successful in any vertical market, you have to choose your partners wisely, and limit how wide you get. We've done that for many years in the IT business, and when we entered the Video market we used Video-Insight in 2006, and in 2009 we moved and remain 100% Avigilon. Aside from features, the #1 thing that earns my loyalty, is their SUPPORT.
Based on what I know now, I would not change a thing, except for when I might have bought or sold my shares of stock in several companies.