Cycling+ UK is my current favorite. I think I posted here before that I can read an entire issue of Bicycling mag in two 35 minute subway rides, but it takes me a week to read Cycling+. Each issue includes detailed descriptions of 2-3 ride routes (this month's issue had a ride through Ireland that made me wanna hop a plane), comparison tests of tons of bikes and products, and updates on what's going on in the UK cycling world. I've become a huge fan of Sustrans and wish we had something similar here in the US.

Dunno if I'm going to renew my subscription next year or not, though. The exchange rate from USD to GBP is a killer I'll probably just start picking it up at the newsstand again.