Dear OP, when you said you exhausted every possible ways to fix your phone delay issue, I could speak for some people here that, you don't. For one, not all N900 could operate normally after overclocking, very few users reported all the unexpected problems with overclocking kernel. Yours is one of them.

It's unfortunately the problem with the quality of the hardware you purchased. Probably not your fault.

However, I do appreciate the way you handle this and say goodbye here to us nicely. Unlike some goners, they'd come back and rant like we owe them for the eternity.

In short, good work. Rest in peace, you don't deserve their torment. Enjoy other phone. So long, though we hardly know you.