MIDEAST STOCKS-Egypt hits eight-year high on FX euphoria, state payment plan lifts Saudi

* EGX30 index rises above February 2015 peak * But closes well off high, trading volume eases * Broader EGX100 outperforms for first time in rally * Foreigners net buyers by a large amount * Saudi index rises above September peak By Andrew Torchia and Celine Aswad CAIRO/DUBAI, Nov 8 (Reuters) - Egypt's stock market surged to an eight-year high on Tuesday because of hopes for foreign fund inflows after the currency was floated last week, while a plan by Saudi Arabia's government to pay debts to t