For my interests and usage, my 29C is more a stay-at-home calculator because of its collectable status and the delicate nature of Woodstocks. Secondly, from a function set and programming standpoint, aside from the Rapid Reverse Branching and memory register proportion at 98 steps, the 11C seems to fit and even exceed the 29C's capabilities.
As a matter of reference & comparison/benchmark, thanks to the Museum DVD, I've browsed through the 19C/29C Application Books. From what I saw, all these programs, even the 98-step ones, with the 11C's memory proportion at that stage, will coincide with the register requirements of each program in all of the programs from the 19C/29C Application Packs.
On the other note, as I also have a 15C, if I need a 29C with a boost, the 15C (or even the 42S) would serve to enhancing my programming conversions of 29C apps.
Edited: 14 May 2012, 8:43 p.m.