I would go with a 195/55/15 in the Michelin xice tires. Virtually the same OD as stock tire and a very good tire for the winter. Or you could go with a 185/60/15 blizzak but it is slightly further off from stock OD (although it's still very close...23.7 vs 23.5 (the 195/55/15 michelin xice I mentioned is said to be 23.4 OD vs stock 23.5 but the tires that came stock on my car (Michelin Pilot Sport a/s 3) in 205/40/17 are said to do like 887 Revs Per Mile and the xice from them is 888 Revs Per Mile so that is virtually dead on...(there are more differences between different tires of the same size than that in most cases)). I have the blizzak ws80 in 205/40/17 I am going to use on my stock FiST wheels this winter because they were only used maybe a couple months if that last year on my old SVT Focus before I bought the FiST so I am going to use them until I need to replace them (they are EXCELLENT winter tires, literally night and day over ANY all season made, I gaurantee that) then I will probably just go with 15 inch steelies and go with the Michelin xice which also seem to be very good tires. I will go with the 195/55/15 size as it's so close to the stock OD it's virtually dead on (to keep same gearing, speedo and MPG readout correct).
I also went with the 195/55/15 BFG SC2 tire to go on my matte black TD pro race 1.2 wheels that are on their way to me as we speak. They also have a 23.4 OD but the Revs Per Mile according to tire rack) is 888, same as the Michelin xice 195/55/15, as opposed to 887 for the stock Michelin all seasons my car came with. If accurate speedo and gearing matters to you, go with a 195/55/15. But if you're really knit picky, then check tire racks stats and look at the Revs Per Mile if it's listed. As I mentioned 1 rev per mile difference is virtually identical as their are more variences than that between different tires of the SAME size, let alone difference widths, heights AND wheel size
Foot notes:
Bridgestone Blizzak ws80 are WICKED BAD ASS in winter and I HIGHLY recommend it
You can go with the Blizzak in 185/60/15 and it's pretty close to stock
You can also go with the Michelin Xice tire which is also excellent from what I hear in 195/55/15 and it's virtually DEAD ON with stock OD and revs per mile according to tire rack.
I HIGHLY recommend some sort of winter tire if you see snow where you live, the difference is literally NIGHT AND DAY over any all season.
P.S.
The Nitto Neo Gen are supposed to be one of the better all seasons as far as snow capabilities and they were TERRIBLE on my SVT FOCUS....whereas the bridgestone blizzaks I had on for a little while last year were AMAZING. In up to 4-5 inches of snow going up hills in gravel driveways and whatever the car almost felt like a 4 wheel drive and rarely spun at all if any and was very predictable and manageable.
If you've never used dedicated winter tires do yourself a favor and DO IT. You won't look back. I do not like all season tires. I prefer summer tires in summer (2.5-3 seasons where I live) and dedicated winter tires in winter. It costs a little more but WELL worth it and so much better that way.