It's just really depends on your taste, provided that sharpness isnt your thing the 35 1.4 classic isnt a bad lens. As for the 40 1.4 and the 28 2.0, I haven't used the 40 1.4 so I'm not sure regarding it's performance, I got the chance to use the 28 2.0 briefly and it was really good imo, although I wouldnt go as far as owning one myself as its just a focal length that I dont usually use (I was shooting this on film).
40mm- 45mm is an odd focal length for many but its a focal length that I actually enjoy using, its great for those shots where a 35 is a tiny bit too wide and a 50 is just a tiny bit too narrow, if you dont mind this focal length you may want to consider a M-Rokkor 40mm F2 CLE (Make sure you get the CLE model) they're pretty much a rebadged Leica summilux back during the days where Leica commissioned Minolta to make lenses for them. It's a really sharp comapact lens thats great to adapt to the NEX.