A Chinese friend turned me on to this place: Chifa Nueva Av. Aviacion 2873 San Borja, and I'd like to recommend it to all of you Chifa lovers out there.
We were really impressed. A very wide menu.. and the cool thing is that they have a second menu with traditional chinese dishes, but with pictures, so you get a sense of what you are ordering. Funky decor (lime green.. which is a nice break from red and gold), the ubiquitous TV sets, a couple private rooms, clean, good service and reasonable prices.
Apparently they have a good dim sum breakfast, but we went for lunch, so I can't vouch for it.
Add to this list if you have found a much-better-than-average chifa.