I've been thinking "Tech" all the way through this thread. They are great razors for little cost. The only two DE razors I have and use are an aluminum Tech I got for $12 and a Gillette New Long Comb. Both shave very well.I'll bet your head is spinning by now @francospa!
My head is still swimming over all the choices a available these days. We are lucky.
But that said, I go along with the vintage razor mentioned here, the Gillette Tech. Very easy shaver, it seems good with all blades and it's forgiving. It's a great beginner tool. The Schick Krona is another great, easy shaver from the 60's that won't nick you up or leave you irritated. It has a longer handle which you might find more comfortable if you're just coming out of the cartridge world as well. Both can be had for about 20 bucks.
They're not the sexiest razors on the market, but there's a reason they were such great sellers in their day.