I weigh 360 pounds and stand 6' 5". I needed a shock I could rely on so the OEM was out.
I went with Hagon Heavy Duty. It was $469 which included shipping. No sales tax for Illinois online orders.
Christina at HAGON USA http://www.hagonshocksusa.com/HagMono.htm was very helpful.
You have to call Hagon to order. No online orders available. They were out of stock so I had to wait a week before they shipped to me.
I had Cycle Craft (http://www.cycle-craft.com) Yamaha in Woodstock Illinois install the shock. It was the middle of July and I got the bike back in two days. Install was $123.
Rides great. Thought I may have to adjust the dampening but as I ride it seems to be smoothing out.