Is your friend a beer geek? If he is, make something that he can drink at the 25th & 30th. Like a BW or Imperial IPA, Weizenbock. It might need to be a smaller batch though....I was at a Halloween party last night and a friend asked me to brew some beer for their 25th anniversary party next summer. They want 20 gallons of brew. I thought that was a nice compliment!