I'm in sort of the same position.
I have LFR Shin'ka but our guild is only starting on reg Elegon. Slow, I know, but I suspect we'll be spending a lockout or two on him and even then, I have both RNG and another player who can roll on it.
So, for me, I have thouht about gemming Shin'ka and upgrading it once to bring it more in line with reg Starshatter since I may get a fair amount of use out of it and I will likely have another gem made by the time we hit reg Sha. Hell, I might even have two!
It just makes me feel a little dirty to upgrade/gem a LFR item...