As long as I know, the best source for your studies can be Peter Wells' Grandmaster Secrets: Caro-Kann, 2007 book.
It is well balanced - not a repertoire for black or white. And it explains all the possible plans in some good details.
This book somehow reminds me of John Watson's books. A high quality!
The only recent book in explanatory style about Caro-Kann that can compare to this one is the Russian language's Caro-Kann, Classical System, 2011 by Karpov & Podgaets.
Of course, you can find Larry Kaufman's old (2004) repertoire book (1.e4) for Black & White, or even Alexander Khalifman's 3rd volume of 1.e4 Openings according to Anand (2004), but the above-mentioned Wells' book is the most recent that I know of.
As for your chosen system against Caro-Kann, Classical (6.N1e2!?), I can tell that it is good for playing in your OTB games - Black has to be very careful defending against it. But it doesn't suit for correspondence chess - I myself intended to try it, but gave up the idea after checking all the possible variations with a little help of my engines.