You're on the right track. For various reasons (quality, reliability, parts availability), Llama should not be considered.
It's not unusual to run across a gently used Para for $600 or less. I would strongly suggest sticking with the traditional 1911 single action trigger. Not only do you get a better trigger, but it can be worked on far more readily than the LDA system.
I haven't worked with the Springfield hi-cap but my understanding is that they are a Para clone. I don't know if their hi-cap frame is forged, but I know Para's is cast... as well as their slide.
At any rate I'd rather take my chances with Springfield over Para as far as customer service goes. The downside of the Springfield is that it only comes in GI trim, so if you want a beavertail and better sights, it's up to you.