I you may have misunderstood the OP elcarajo, but the switch from earbuds/IEM to full sized cans is quite a big difference. First of all, if you're going to get the AD700's, they're not going to have as much bass as you're used to, but you'll notice much less smearing of the music. Listening to high quality source files (mp3's at 320 bitrate, FLAC, WAV from CD's, etc) will help you get the most out of your headphones. You'll probably hear details that you've never heard before and there's just a clarity to the music that makes you think: "Wow! This is amazing!"
If I were you, I would start out slowly, not everybody has upgraditis. Don't take everything you read on these forums for granted, and enjoy the music!
Welcome to Head-Fi, sorry about your wallet!