The big issue is there are a lot of top 4 D men available based on how much they have played over their career and recently, but a lot of people on here consider them fringe NHLers. Its almost a given that when someone wants a top 4 D on HFBoards, they usually mean a D that is top 2 in minutes on any given team, and sometimes thats not good enough. So many fans seem to think a top 4 D man needs to be a 30 point player, whereas if you look at the stats, there are sub 30 point D men that were in the top 64, i.e. top pairing numbers .....
Just look at last year. If you went strictly by points, 17 points puts you within the number for top 4 dmen around the league (32*4, 128th).
So when you say "top 4 dmen", get ready for a lot of players no one wants to consider top 4 dmen, but in reality are. And especially on the right hand side.