Thanks amelialw, furtwaengler, and cmg--your feedback is very much appreciated. I sort of got a little impatient when had another idea and double posted... Sorry about that. Okay, so I have to distinct first halves and I love both of them:
Bach Fantasia in C minor, BWV 906
Bach-Rachmaninov Partita for Violin Solo No.3 in E major, BWV 1006
1. Prelude
2. Gavotte
3. Gigue
Rachmaninov - Two Preludes
1. Prelude in D major, Opus 23 No. 4
2. Prelude in G minor, Opus 23 No. 5
- or -
Bach-Liszt Prelude and Fugue in A minor
Liszt Benediction de Dieu dans la solitude
Wow- very different. I am leaning towards the Liszt and Bach, though. There's quite a bit more depth to that half than the other, although I would enjoy learning either. Do you three have any thoughts? I know you love Haydn, amelia, but I don't think I can fit him in...this time.

I'm going to stay with the all those colorful, and as furtwaengler pointed out, dangerous dances for the second half. The Polonaise is nearly finished.
Have you played the Liszt? As far as difficulty goes, it may be more difficult than it looks--given the tempo and the fact that things look as though they would fall under the fingers nicely, although it certainly doesn't look "easy". The difficulties seem like they would be more musical, and I prefer musical challenges to technical ones.
Thanks again for all your help-
Steve