I was browsing UCCF's website yesterday and was impressed by the range of excellent audio downloads.
Particularly worth listening to are the talks on 1 John by Nigel Lee. If you never met or heard Nigel (who died last year), he was one of the great UK preachers of my lifetime. A prince among Bible teachers, who helped literally thousands of young people get into Christian leadership. Download anything you can find by him while its still around!
There are tons of other good talks on the UCCF site as well. Look out for John Risbridger, LIndsay Brown and Terry Virgo in particular. (Use the filter to narrow down to audio talks only)