I've seen all types of systems. This is just my opinion: really, really try to resist the siren call of the sexy "pimp my system" rigs like the Brutus 10 and SABCO systems. Yes, hardware looks great, but your goal should be making good beer. And the easiest and most economical way to do it is to use a rectangular cooler as your MLT. Over time, and as you get older, you'll also appreciate how much easier it is to transport smaller/light-weight/modular components instead of three 15.5 gal SS keggles and 200+ lbs brew rigs. IME, the best beers have often been brewed by guys with really simple systems. Focus on the process (cleaning, sanitation, fresh ingredients, water profiles, pH, mash temps, yeast starter, fermentation temps) and not the equipment.