This model is very similar to the DC25 Animal but has extra cleaning tools. This model is also exclusive to Comet. These were last on offer at Easter (I posted the deal) and they sold out very very quickly. All stores have a good availability.
I would also recommend Zorb to go with your Dyson, Comet do it buy one get one half price, and it is good for cleaning carpets and keeping them looking like new.
"EXCLUSIVE TO COMET. Dyson DC25 Overdrive includes 3 free tools for all-round cleaning and Mini turbine head for pet hair pick-up, Stubborn dirt brush for dried-in dirt and Soft dusting brush for gentle dusting worth £53.95. It uses Ball technology for easy steering. With patented Root Cyclone technology there are no extra bags or filters to buy. FREE 5 YEAR GUARANTEE"