I just bought a VFC H&K 417d, a 500 round hi-cap, 7.4 lipo crane stock battery and 6000 .30g BBs. From my initial testing its a fantastic gun.
I only wish i had considered the HK 417 before i bought my G&G GR14 HBA-L, as they are the same price and the 417d works just as well (if not better) than the GR14.