SA's Custom Shop indeed has some very nice & very pricey XD models. There are three choices ranging from $750 to $1500. The one mentioned above is the Tactical Pro for $900 (this doesn't refer to the length as you can get it in 3", 4", or 5"). The lower end Carry Pro gets a 4.5 lb. trigger and some enhanced fixed sights as well as fitting the factory barrel for better accuracy. The top two models have match fitted barrels as well as adjustable sights, 3.5 lb. triggers, etc. The $1500 Custom Pro also gets an extended boattail and stippled grip compliments of Robar. I've got to stop now cause I'm starting to salivate again! 
