Well it all depends on what you want to do and what industry and field you want to get into? First i would tell you to figure that out and then take a look at the suppliers section and see what other users have said about certain products from certain sellers and you will get an idea of what is selling out there and what you could get yourself into.
I think just starting out your best options would be to study the market first and see what is hot or not...and go from there