For those, the latest version is KVT49L. You can flash the update manually if you want to, but there's no benefit to doing so other than the geek satisfaction of knowing you're running a bleeding edge build.
May want to add that if you do decide to go to KVT49L, you may be limiting yourself from future OTA since your unit will be considered a "Verizon" unit per say and "may" be skipped when a new released get pushed OTA.