I just recently pruchased a 410hlf and I can already tell that it will become one of my favorite cabs in terms of portability and TONE. The berg nv610 might have been a little easier to tranport since I'm a tall guy and it sure felt lighter (from the website the ampeg is about 10lbs lighter). The lows are just beastly. Call me tone deaf of what you will but I can already see myself liking the ampeg more than the berg. I could not be happier with my cab change. Ampeg SVT-410HLF FTW 
