First of all, buying tools is an INVESTMENT not a PURCHASE.
90% of my tools are snap on, if its a career you may as well start buying quality tools from day one. It takes awhile to get a full box.
2nd favorite outside of snap on is kobalt.
Its not just quality or price... snap on makes some of the best tools, such as a 80 tooth ratchet. Best invention ever for getting into tight places.
Now I work on big trucks (firetrucks, twin diesel engine runway trucks, dump trucks, etc) so I have to now invest in BIG tools. 2-1/2" and bigger wrenches.