Thanks, guys.
I kind of like the second one most too. At bigger size it reminds me a scene from some dark gothic movie, where there's a master vampire just about to leap out from the grave
No, I didn't use filters, 72mm filters are not exactly cheap and I've yet to decide which ones to buy. For converting to b&w I used photoshop channel mixer and if I reacall correctly then first pic is just the green channel and the second is 100% red + 6% green + 6% blue. Channel mixer gives more control over b&w conversion than just desaturation.
As for sharpness and detail, then I'm continuously impressed with Sigma 17-70. Of course I can enhance it in PP but I can only enhance something that is there already.