If you love the look of these beautiful ships then there is no better way to get one than the Deans kit. However, as said already, it is a big kit! Mine stayed in the box for several years before I summoned up the courage to start on it and took about a year to complete.
If you are interested in historical detail then do decide which ship you are going to build before you start. This was the largest class of battleships ever built and all of them had subtle differences, in the position and type of masts, torpedo nets and shape of turrets to mention a few. On the plus side, most of these ships have no surviving models - I've not been able to find any builder's model of any of them - so of the 9, you have 5 or 6 to choose from without fear of meeting another one! I've never come across any model of Jupiter, Prince George, Victorious or Illustrious.
The most convenient source of information is Conway's Warship Vol VII (1983) in two articles by RA Burt. Much of the same information is in Burt's book BRITISH BATTLESHIPS 1889-1904 which is quite expensive! The PRO at Kew have official photos of most of the ships which is invaluable if your model is 'as launched'.
My model of Mars is based on the Hannibal kit which contains a lot of extra detail. I suggest getting Ron to show you the kits so that you know what you are getting. I used the hull and superstructure base straight out of the box but scratch built most of the bridge detail because Mars has the foremast going through the wheelhouse, not behind it as in Hannibal. Make sure the hull has plenty of re-inforcing to keep it stiff and make the fit of the upper deck between hull and superstructure as accurate as humanly possible so there is no unsightly line. I filled the ram bow solid for about 3" back because that ram really works!
The model needs plenty of power and I used two car heater motors which give superb slow turning props in complete silence. Be sure to have differential power because the model will turn on it's own axis which is quite helpful. Here's some pics: