Get the best you can afford.
Whether you're flying your 900 hours a year, or just 20, hearing loss is irreversible.
You might want to consider getting a 'simple' headset now, but putting aside some money every year, and in three years or so, buying the absolute top-of-the-range headset. This way, its not a huge financial outlay all at once, but you will get what you need reasonably soon.
And once you buy the better one, your current headset becomes your spare, or for a passenger, etc.