No Idea about what you have in shops where you Live , Are you Living in Portugal ? Or Where?
so brand name dropping is not very useful .. some are international , others relatively Local Importer's names..
a bike Built up in a big factory (most are in Asia now) and shipped as a whole , to a Bike Shop
will cost less than one bought, and custom built-up, as separate parts wheels and etc.
and fitted to a frame-set , also bought separately ..
state a range of brands , and link to their websites ..
narrow the Universe to smaller things you can touch .. and test ride.