First off be careful, it's not too easy to get the club you want as i found. I'd won the Champions League twice and a load of trophies with Arsenal but couldn't find a job once i quit. Try and line up a job with some applications and stuff, i wouldn't leave you job as i missed something like 6 months of the game because i quit.
I liked Milan, i moved there after 3 or 4 seasons with Arsenal. Their budget wasn't big to start with because they'd dropped to something like 18th and their finances were buggered after dropping out of Europe the season before. I had to clear out the high earners which was a challenge in the next window and find interested players (there weren't many, i had to pick up a very old Berbatov to save me). I managed to get around £40m from sales and a budget of £26m in my third season but left for Dortmund.
So yeh i'd recommend picking up a Serie A club if you can, Fiorentina, Juventus, Napoli, Milan. You can sell and win your way to a good budget within a season.