From what I've seen and heard, the quality of DSA is top-notch. A DSA is on my list of things to buy. I would put quality for DSA over HK. With HK, you are paying for the name (and probably pre-ban status), not necessarily quality. I have a Springfield M1A, and love that. Quality is superb. However, with the DSA, you can have 20-rd mags for less than $10 per. Check out http://www.fnfal.com/falfiles/ for more info on FN-FAL type stuff.
Hello. I shot a buddie's carbine version of the FAL w/stainless "match" bbl. It would group well with Federal Match 168 gr HP factory rounds, about an inch. My full-sized FAL doesn't group with anything heavier than 150 gr bullets so the twist must be a bit faster.
No malfunctions and a very nice out-of-the-box trigger, too.