Which is easier to change - a screen, or ESN?

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http://androidforums.com – I think my phone has a flaw with the touchscreen system. Any app (games mostly, in my use) that requires a dragging action on the screen, will eventually result in a crash. If all I do is tap on the screen, I'm generally fine, but swiping or dragging will get me a system freeze & crash within a couple minutes use. My system details - DX, 621, rooted, running kY's modded factory ROM. So which would be easier - change the screen, or transfer the ESN to another phone? Or just get a different phone? :( (General)