I own a couple of pairs of the Weapon Conection deluxe sai.
Found them to be tough, well balanced and very durable.
Honestly the delux model is a bit heavy, great for strenghing the wrists--but their mass makes them slower than I would like.
A bigger guy might have no problems at all.
I would recommend calling the guy at Weapon Connections and speaking with him before you buy.
Also, I think that the sai come un-wrapped now, see if you can get them wrapped prior to shipment-unless you are good at wrapping.
To be honest I have not bought the comparable Shirado product so I really can't make an good comparision.
I prefer round sai. No real reason just do.
[This message has been edited by cxt (edited 02-08-2005).]