EXACTLY!!!!
I want to play Chopin's Fantasia Impromptu. Its like a 5 year goal of mine. T-Block, you have inspired me to practice. 
I'm trying to learn that one too, lol. The hardest thing is the timing. You got a 3 pattern in the RH against the 4 pattern in the LH, all playing at the same time. My brain can't keep that straight.
I should upload a recording of me playing Transcendental Etude No. 10 in F minor by Liszt. I played that at Jury, 2 years back, at the end of that school year. Of course, it was played by memory, so the sheet music I used to practice was very colorful! LOL!
Ummm...Heck-to-the-yeah, you need to upload that A.S.A.P. cuz I wanna hear it.

Now the question is, can he do that in ALL 12 Keys????
U know, I've actually tried to take some classical pieces and learn them in other keys. The thing is, the composers wrote the pieces in that specific key for a purpose. IMO, it really doesn't do the pieces justice to play them in other keys.
I believe one of the greatest lessons u can learn from classical music is PRECISION. Everything has to be 100% in its proper place to really get the most from the classical pieces. The right fingerings at the right time with the right dynamics can mean the difference between success and failure. It's definitely a genre of patience and long-suffering, lol.
If u like slower tempos, here are some pieces I recommend:
"Prelude No.4 in E minor" - Chopin
"Raindrop Prelude" - Chopin
"Funeral March" - Chopin
"Nocturne in Eb, Op.9, No.2" - Chopin
"Moonlight Sonata, Mvt. I" - Beethoven
"La Fille Aux Cheveux De Lin (The Girl With The Flaxen Hair)" - Debussy
"Gymnopedie" - Erik Satie
"Heliotrope Bouquet (A Slow Drag Two-Step)" - Joplin
"Solace (A Mexican Serenade)" - Joplin
"Adagio For Strings" - Barber
I could go on and on and on, lol.