Thanks for the replies, guys! So far, pretty much everything you have said mirrors what I've come across in my research. Here's my list of pros and cons for each:
1911 Officer
+ slim
+ familiarity with controls and trigger (my main handgun is a 5" Gov't)
+ I feel that 45 ACP is an ideal compromise in stopping power/recoil/muzzle blast
- reliability is questionable until ~500 rd. break in
- relatively blocky/angular shape may increase printing
Ruger SP101
+ reliable
+ speed strips more concealable
+ relatively organic shape may prevent identification as a gun when printing
- I'm OK with using 38 Special (FBI Load), but I'd be more comfortable with 9mm and above. 357 Mag is really powerful, but at the cost of recoil and muzzle blast.
- almost no practice on DA trigger
Man, it's still looking pretty even to me. I think the question of reliability in the mini 1911 and the lack of proficiency with a DA revolver can both be solved with time and effort. I guess it's going to take a bit more fondling time to answer this question. Usually someone yells out "Buy both!" by this time, and I intend to do so eventually, but for now I'm at the point where I'll be selling off a gun or two to fund this purchase.
Oh yeah, here's another question. I live in CA, but soon I'll be moving back to VA where I can legally carry again... whoohoo! However, I'd like to have my carry gun ready for my cross country drive back to the East Coast. I have a FL permit, and it looks like it has reciprocity with most of the states I'll be crossing through. Any thoughts on choosing between the reliable yet unfamiliar DA revolver vs. the potentially unreliable but familiar SA auto if you were in my shoes?