I am 6' and my ultimate goal is to be at 200 lbs. and 9% bf... (for starters).
if you are 5'8 I reckon 190 - 200 lbs would be also a good weight for you to good "solid".... again, if you want to look like a huge bb, the sky is the limit... However, remember, the lower the BF, the better you look without needing to be HUGE in weight terms: Think Brad Pitt in Fight Club or Troy... I am sure he was also not that heavy, but he looks bigger.