That's around 300 miles a week and say you avg 7 months of that- that's around 2100 miles of riding.
With that kind of mileage, I don't think you should feel bad about spending a tad more on a bike with more quality parts.

However, I don't see anything particulary bad about State's bikes. Lots of fun styles (love that Montecore), they look great.
cro-mo frame and no-name components but it all looks decent. No name seat post and stem could be comparable quality to bikesdirect, for example.

You do get more for your money from bikesdirect, not stylish but functionally much better parts and frame.
Reynolds double butted cro-mo, sealed bearing hubs (State's look like open ball bearings-not sure though).

I think the bikesdirect choices will have a better chance of giving you trouble free service.
(State could very well too, it's just more likely with higher quality components.)

The great thing about singlespeeds is they are simple. It's not like a geared bike where cheap components can really affect performance and enjoyment.
You can shop more too, there are many options in your price range.

If building up is worrying you, call a few bike shops to check willingness and prices before you decide.
good luck!