You can cross NY-18 off of the list, now that the self-funded guy with some money who had a small chance of knocking off Nita Lowey announced he's out of the race. The Republicans are putting up the guy who got crushed last cycle - and he'll lose again by double digits.
To finish California, in NorCal, CA-11 (McNerry) ought to be competitive and isn't really much of a sleeper since it is a R+1 district that Bush won in 2004. The only NorCal sleeper may be CA-18 (Cardoza), a D+4 district in the Central Valley - though I don't have much faith in a candidate whose website is down, even if he can self-fund to some extent.
There actually may be more Republican incumbents in danger in California than Democrats.
CA-11 is certainly no sleeper. Republicans have a good chance of picking it up (although it's less than 50% imo).
CA-18 is another one of those moderate Hispanic heavy districts that Republicans should be able to pick up in theory. But you need a good candidate to win this sort of district. Another thing going in Cardoza's favor is the issue of delta water pumping restrictions becoming less of a concern now that we have had a pretty wet winter.