Welcome to ArboristSite. You may get better results on this question if it is posted (or moved, which I can't do but others can) to the Chainsaw forum.
5 cords is a respectable amount of wood. What type of wood are you going to be cutting, species- and size-wise? That seems an important consideration in helping steer you in the best possible direction.
Husqvarna 460 = 60cc, Shindaiwa 448 should be something like 49cc, right? Unless you'll only be cutting small stuff, the displacement advantage of the 460 seems like a factor that should not be overlooked. Both are respected saws. Though the plastic body of the homeowner/farm/ranch Husqvarna 460 is not especially popular, they do seem to work in non-professional (i.e. not everyday) use.
Neither saw would be my first choice for any purpose, though. If you're limiting yourself to $400, there are better choices out there than either model mentioned. Husqvarna 353 or 359, Dolmar 5100s would be good choices at that pricepoint. Obviously, more money gets you into better/more versatile saws, but that may or may not be something you wish to consider.
A lightly used saw might be a better choice if $400 is your limit, and knowing what I know now I would certainly prefer a lightly used pro-grade saw over a new homeowner-grade one.