I have not watched the new episode yet, but I adore most things Sherlock, including Cumberbatch's depiction. I need to slip in a good Sherlock read soon. =) I'll have to add this one to the list.
Do take care to get to "House of Silk" before "Moriarty". Order may not matter quite as much in these as in other series, but it did make a difference to me when reading "Moriarty" that I'd read "House of Silk" before.
And, I agree on any and every other modernization / spin-off / pastiche. Sorry, Mr. Cunberlatch.