I hate to say it lost boy but I'll offer you the same advice I would take myself. Buy the boat you can afford. That means purchase price plus upgrades you want or need. You list 7 items missing from the boat that you obviously consider important. If you can wait for those items, buy the boat and have the pleasure of choosing them and installing them over time. If you need the extras now...you know the answer.
On the other hand, you've seen it, you want it, is there really any question what you are going to do?