+1 on the router, for my applications.
The shaper's most significant features is that it is big, heavy, and has a large motor.
A router in a router table can be made as large and heavy or small and light as you want. My 30"x52" top weighs in at over 100# with Incra fence and two routers. Put that on a base made of 3/4" ply with doors and drawers and fill it with tools (and sand in the bottom, if you want) and you can make it as heavy as you want.
The PC7518 "3hp" 15A router takes everything I throw at it without even a hint of slowdown and the cooling air after I'm done is little more than room temperature.
For *my* money, the only way I'd consider going with a shaper would be if it was in a production environment taking heavy cuts and being fed with a power feeder all day long and stopping only to replace bits.
An induction motor (like is in most shapers) has a longer life than a universal motor (as in router) under long-term continuous duty with a heavy load.
Just my $0.02...
Check out that new high-tech cordless router.. wireless and no recharging required!!