Earphones and headphones for under £50

[mrt331]

Hi

I need some earphones for use with my ipod, and some headphones for use with my guitar amp. Obviously it would be great to have a massive budget for this, but I can only spend ~£50 altogether (I'm willing to go slightly higher if absolutely necessary).

Earlier, I was considering the Sony MDR-EX500LP Earphones and using them with both the amp and my ipod, would this be a good idea?

Other than that, I'm looking at the Sennheiser CX300 Earphones which are really cheap, and then either the Goldring DR150 Headphones or the Kam KHP1500 Headphones, both of which I've seen recommended to people here.

Am I thinking along the right lines? Could anyone recommend anything else?

Thanks a lot.
Mike