I am just about to actually start to R/C battery up a couple of locos ( after a delay of many months) and have opted for the Aristocraft Revolution system as it allows up to 50 locos (as if!) to be controlled from one hand small set with control over sound, smoke and individual lighting options for each loco as well as MU-ing (lash-ups).
The Massoth R/C chip will be great for those who who are DCC and have a Massoth central station and a wireless Navigator already or for those who want battery R/C and DCC but not the cost of the central station. In essence it would be a DCC version of the Revo stuff.
Both of these paths are obviously quite a lot more costly than the cheapest R/C options but they do give far more control options especially if you are wanting to be able to run a few locos (R/C-ed) at the same time and have functions in play as well or will expand your RC-ed roster in the future.
You pays your money and you takes your.................