spain in october
Richard
Of course I would recommend Spain and in particular Catalonia (Barcelona). There's a good raptor, wader and passerine passage and it's a great chance - and in many cases the only place - to catch up on some of Europe's more localised species such as Great Bustard, Little Bustard, Pin-tailed Sandgrouse, Black-bellied Sandgrouse, Lammergeier, Southern Grey Shrike, Black Wheatear, Dupont's Lark, Audouin's Gull, Slender-billed Gull, etc. and you can add in Bluethroat, Stone-curlew, Penduline Tit, Citril Finch, Calandra Lark...
Take a look at my website and blog (links/addresses below) for more details on possible species, best locations, etc. and feel free to contact me for further info even if you intend to go it alone. I'm always happy to help (on condition that I receive details of certain sightings).
If you want a guide, I can also pass on contact details for professional operators in other parts of Spain.
Good luck and I hope you'll post a report here when you get back (people rarely do and it's so useful for travelers).