I've ordered my 24-105L f4.0 IS. I want a good prime for better portriats and low light stuff, but just cannot decide!!!
I've blown my budget for the 24-105 so can't afford an L prime. Another $300 isn't such a big deal.
1. Replace my 50 f1.8 with a 50 f1.4 ($320) because the bokeh and occassional missed focus bugs me (otherwise its a very sharp copy). I like the 50mm length. Added advantage: I get the $60 back from selling my f1.8 and no longer suffer occassional dissatisfaction. Disadvantage - no new length choices.
2. Get the 85 f1.8 ($340). Real nice bokeh, USM, etc. and nice length for slightly more distant situations. Images comparable to the 50 f1.4, just longer.
3. 35mm f2.0. This is a mystery for me. I don't know if (similar to the 50mm f1.8) it just gets good reports because it's so cheap, or if it really does compare with the other two.
If you wanted to fill a yearning for a medium to short prime, to supplement a 24-105 f4.0L IS, what would you get (for the 3 - 400 $ range)?
Note: Lately; I've been using the 50mm about 1/3rd of the time and find the length well suited to my 20D. The rest is my very sharp Tamron 28-75 f2.8. The 24-105 will become the new primary choice, saving the Tamron for low light situations.

Not saying that you take portraits, but its something to keep in mind.
