I had a Para P13 (was an idiot and sold it) for over a decade and during that time it was my most reliable handgun. It ate everything I put in it and a lot of that was junk ammo, as my budget couldn't afford better. It had decent accuracy, maybe 5-6 inch groups at 25 yards. About half that at 15 yards. I always thought it was a good, reliable gun.
However, later, after I'd sold it, I heard many tales of woe about Paras in general. I guess I just got lucky.
As for R.I.A., I've never fired one, but I handled a few and came away impressed with how smooth the slide worked and how crisp the trigger broke. That GS had several models and all of them were the same in those aspects. As they had several makes of 1911s, I did a quick comparison and to my surprise found that the slide was smoother on the RI than a SA RO, a Colt 1991 S80, and a Ruger 1911. The same was true for the trigger break. There was a little more take up in the RI vs. the Colt, but if there was a difference in trigger break between those two I couldn't detect it.
Alas, none of the shooting ranges I frequent carry much in the way of 1911s, so I never got a chance to shoot an R.I. But I am curious now.
I do own a Ruger 1911 LW Commander and it's a pretty good work/CCW type gun. Accurate enough (2-3 inch groups at 10 yds), and so far has eaten four different makes of ammo and my reloads without issue. It has had a few FTFs and one stovepipe, but most of those FTFs were on my reloads which might be a tad too long, and I think the stovepipe was my fault. I'm planning on running at least 300 rds of store bought ammo through it to verify my theory.