Mike Milken was sentenced to 10 years and barred by the SEC ...but I digress....
@Sarrouniya, the quality of service at your broker (or most places for that matter) is proportional to the size of your portfolio and the frequency of your trades ... along with other "ancillary benefits" that you may from time to time, procure from them ...investing in their in-house funds, discretionary account, buying research, etc.
How much do you plan to invest?