("<=" . [?≤])
(">=" . [?≥])
The reason is that we use ≤ when implementing "LESS than or EQUAL to (<=)" comparision and ≥ when implementing "GREATER than or EQUAL to (>=)" comparision.
So "<=" will probably be more intuitive than "_<" and same applies for ">=" and "_>".
I can of course create my own binding to do that and the bindings you have are not difficult to remember.
But I thought of mentioning this as it's early enough to change the bindings if you and others agree with my reasoning.