Ok, found the GXV3662 FHD, the price is about £300 vs the £400 of the ACTi E74, and it would need an extra Illuminator.
A question, http://www.use-ip.co.uk/acti-e74-3mp-outdoor-dome-camera-with-d-n-ir-superior-wdr-and-a-fixed-2-93mm-lens.html
Does the ACTi E74 support PTZ? It isn't clear in the spec for it... There is another dome with "PTZ" in the name that is double the price which makes me wonder. It does have "PTZ" in the user manual.