Most Electronics are generally the same as or slightly dearer than you would find the same item in the UK.
For IT equipment you can buy cheap in the Phils but it's older technology, you will get things like the latest computer memory much cheaper over here.
As for trying to import a flat screen TV into the Phils I think that is a little crazy to be honestA small one in a suitcase will get destroyed in transit and you could be questioned at customs as you enter the country.
Small electronics (latest and greatest) buy in the UK, large stuff buy in the Phils.
Jim