Bit of a quandary

Hi,

I feel that my videography interest/development is growing and as such I am in a Quandary of what equipment to choose for my future film making.

For background my main subject is "wildlife" and a such I use a Panasonic V720 Camcorder as it has a 50x izoom which is great for filming wildlife in the field. I have recently bought a Canon 70D which "blows my socks off" the Panasonic V720 in terms of video quality. 

I feel that the Panasonic does not deliver the picure quality the Canon does, even when I attach a 400 f5.5 lens here is a recent video with the Canon and 400mm lens

and here is a video shot with the Panasonic V720

I suppose I am looking for a semi pro camcorder that has zoom and can give quality video, I note this Panasonic is about to be released in the UK

http://www.panasonic.com/uk/consumer/cameras-camcorders/camcorders/hd-camcorders/hc-x1000e.html

Which has a optical 20x zoom (which the makers claim is 600mm) , however my trusty Panasonic has a 50x izoom.

So I am confused on where to go next, do I concentrate on the Canon 70D and invest in a quicker lens, perhaps a 400mm f2.4 lens, or do I go down the dedicated Camcorder route….

As a foot note I have just finished a 32 min wildlife documetry that was commisioned by 4 wildlife trusts, and goes on sale on the 28th of October. following a preview of the documentry I have been asked by the comissioners about 2 further projects….

Hope you can help.

Dave