Oh Surila! Your post just really caught my attention!
First off, I have to tell you that I still haven't attempted knitting a true/real sock, so I won't be the one to give you the answer(s) you're seeking.:shrug: However.... until I'm ready to take that plunge, I've been knitting tube socks on size 2 circular 9" needles. (with sock/fingering yarn) When I get to the point in the decreasing, (toe), where the the stitches are getting too stretched around the cable, I switch to my little 4" size 2 DPNs. This is where things slow down. I'm still a novice when it comes to double pointed needles.
You will get some great advice, I'm sure, from some of the expert sock knitters here. WHEN I feel I'm ready for the "real" thing I still think I'll do the cuff on my mini 9" circulars and then switch to the DPNs when I get to the heel. I hope you'll keep us posted on how it's going. I'm anxious to hear what you decide to do. Actually I'd also be interested in where you are in your knitting skills. That might help others with their advice. Jeanie