Rather than choosing brand names and vendors and parts at this stage, it's best to start with a set of very specific goals for what you want this engine to do, and how, under what conditions, in what kind of car, with what transmission and rear axle ratio and tire size, running what kind of gasoline, at what altitude above sea level, on what kinds of roads, at what kinds of speeds, and with what budget (in time and money and effort).
Starting by picking a list of parts that sound sexy is a good way to spend a lot of money to wind up with an unhappy result.