i don't think a scottish 80 will be over your head. if you want that style, go for it. i'd try to use a neutral ale yeast like wyeast 1056/wlp001 in case it gets a little warm during fermentation. try to get it in the coolest spot in your house and let her rip. the late extract addition seems to work well with many people, so i say go for it. and kudos on doing a full boil, you'll like the results.