"Pre Boxed Systems" are only great when they are a steal of a deal, or nothing else is available. Even though they are all adjustable from 3-12mm and half are domes and half are bullets it doesn't mean they are cameras that will fit your needs or the location where you plan on placing them. Further more, those domes are large - if this is for a residential setting and you want to place some inside the home those are huge. If you want to place those bullets outside they are the IR clusters and not a newer lower power requirement Matrix IR (Which in my opinion also gives you a better/more even picture). Bottom line - most installs require 2 - 4 styles of cameras depending on the size of the install and needs of location so expecting 8 bullets and 8 domes to do what you need might not be the case. You will most likely find yourself using mult cameras just to get the coverage you want or over lapping coverage just because you have extra cameras. If your budget is $2500 and this system gives you 16 cameras - you can most likely spend $2500 and get better cameras and only get 10-12 and accomplish the same task with better quality and coverage. More cameras doesn't always mean better system.
Bottom line - Look at the Catalog from Milk. Get cameras specifically for each location. Also keep in mind in some areas you may want a 2mp instead of a 3 or 4 as the 2mp will provide you a better/cleaner (less noisy) night image. Here is a review on several LTS cameras I did awhile back - might give you a little better idea of those cameras
https://www.ipcamtalk.com/showthrea...p-Camera-review-example?highlight=LTS+3mp+4mp
LTS and Nelly's are both very solid companies. Both have amazing tech support if you need it, great warranties, and LTS pretty much has next day replacement for warranty/RMA's (least for us, as we're only a few hours from our primary LTS dealer).