hi, and welcome!!!
i've been to sachsenring, jerez and estoril. if you decide to go to any of these circuits i can give you information on them. as for mugello and/or misano: every italian i spoke to said that the weekend is chaos chaos chaos. italians are motogp- and vale-crazy, so yeah... book EARLY is all i can say.
and if you need help, i speak italian, too...so just send me a PM if you have questions.
anyway, welcome to the forum!!!!