Mine: Advance Adapters HD SYE & Tom Woods Shaft
No better combination IMO. The Advance Adapters kit is a solid unit and has been proven for years to be plenty strong. And Tom Woods is one of the TOP makers of custom drive shafts. They have kits running $350-$600 depending on options.
The super short SYE kits are nice, but do not retain the stock speedometer gear, and instead use a tone ring that digitizes the speedo reading and needs a computer to calibrate.