Hi there

Have a look at the HDR-CX450 : HERE

It seems to tick the boxes you require.  Shopping around, you can get it at Argos for £219.99.  According to the manual (attached to this reply) as well as an Amazon review HERE, you can attach an external microphone if required.  As far as I can tell though the cheaper model (HDR-CX405) does not have this option.  So beware on not mixing models up.

Cheers