Dividends would only save you the National Insurance tax (NI tax is roughly 11% and 12% for employees and employers) thus saving the business roughly 23%.
The personal income tax rates are 20% and 40% so you can see that it is advantageous to stay under the 40% bracket.
Some companies take on a partner or spouse and pay them a wage. Whilst HMRC have tried to clamp down on this if you can prove 100% the your partner / spouse is needed in the business then pay them a wage instead.
As for the Nintendo this would be like any hardware purchase. It's cost would be written down each year until it is worthless for the business and would be disposed.
The best thing to do would be use it in the business for as long as desired / is sensible and then sell it to yourself or a colleague for the going rate.