Relaxed Hair Care Regimen...What flat Iron should I use?

So, I will be leaving for college in August as a freshmen, and it's about time I get used to knowing how to do my own hair ( I can't spend $10 every week for a ). I have thick relaxed neck length hair. What's the best flat iron out there on the market. I heard the Chi and Sedu were good ( I don't care about the price). What are the best deep conditioners, protein conditioners, and moisturizers for relaxed hair? And whats a good professional hair dryer? And how can I minimize breakage.