Hi and welcome to the forum, one tip shorter posts encourage people to read what you have written, I understand you have a lot of questions, ask them one at a time .
You really dont need a dual tech in your kitchen, DT's are made for hostile areas like garages barns ect. People think because its made up of two technologies and it costs more it must be better. They dont understand that its made for a different environment, the only time I would use DT's in a domestic environment is if I am using pet tolerant detection where the microwave is specifically designed to prevent false alarms from your pet. Quads are the better detector for domestic non quad if you are on a budget.
Texe imo is not the best you can get, but you are already fairly confused on what you really want so I wont put you off.