I myself would always solder anything and everything I could, either with (the best all around)crimping, or not. I've been "playing" with this stuff for nearly 40 years now, and if it's a pain to reach, and you CAN solder it, do it. I've seen and had many oddball issues related to screw/crimp on connectors over the years, and the few minutes/seconds it takes to solder them is well worth it.
I have a very expensive shortwave radio that had mysterious intermittent problems that couldn't be found by a service tech, even after repeated tries. Eventually, just by accident, I found it myself, one of the crimped cables that connects the two main PC boards was causing the whole thing. I could wiggle the plugs and cause/cure the problem. I ended up soldering the RCA plugs onto all six or seven of the cables and the problem was a bad memory. This radio cost about 1400.00 new, without accessories and used cheap RCA plugs on shielded cables for signal interconnects. The thing is built like a tank, and has no real weaknesses except for those cheap cables! Amazing how companies try to save a dime or two...
http://www.dxing.com/rx/nrd515.htm