X10 - problems are unbearable!

[BobbleX10]

Not sure if it is a common problem, but my x10 is practically dead!

Constant boot loops and periods of not even being able to switch it on!
Had intermittent problems since updating to 2.3.3, I could be either browsing the net or using an app or game and the phone freezes for a couple of seconds and then turns itself off and goes into a boot loop for anything up to 3 hours.
Removing the battery and leaving it out for a while doesn't help, as soon as the battery is replaced it just continues boot looping.
When it stops boot looping, it's as if the phone is switched off, hold the power button to turn it back on and the phone vibrates as if it's about to power up and....nothing.
Just seems it has to be left (for anything between 5 - 12 hours) and it will miraculously turn itself back on and all will be fine.
Until it decides to go again, sometimes it's fine for a day or so, sometimes it'll start again within a half hour or so.
I have removed a load of apps and games just in case it's one of those causing the bug, also tried a clean install using both SEUS and PCC.

Anyone have any suggestions on what could be causing the problems?