The Great School Debate (in my head).

My 5 year old is going to be heading to school in the fall. Well, to be fair he is heading to kindergarten, he has spent the last 2 years at an amazing preschool, which has been fantastic. The problem is that the preschool is so good, I think N is going to be beyond bored at kindergarten. He has been learning to read through a great phonics program. He can identify all the letters and their sounds. He can write his first and last name and also his nickname. Currently he is working on learning to write his letters up to 20, and is cruising through the process. Needless to say he knows his colors, shapes, months and day of the week. I am afraid he is going to be WAY under challenged in "real" school. He is reading well, and will be on to the 2 vowel books in the next week or 2. So here is my dilemma.......what do I do? I am planning on enrolling him in public school and sending him to the kindergarten enhancement program that the preschool he is currently at offers. I am so afraid of loosing his love of learning. N loves to be challenged and to learn new things. He loves to try something new and to be proud of himself when he masters a concept, which to be fair (okay and maybe brag a bit) he does quickly. I know of a charter school here locally that I can try to get him into, but am unsure of their processes. I am planning on private school for 1st grade, the only reason I am steering clear of it his year is that it is all day kindergarten and I do not care for that. As an added issue for kindergarten, is the whole year round schedule thing, which I am so not accustomed to. I am feeling really confused and torn. I want to do what is best for the bug-bite. But what is that? This is one of those moments when being a parent is not a lot of fun. I feel like I could screw up his whole future if I make the wrong choice. So ya know, no pressure or anything!