I have a Nashbar carbon cross fork and I wouldn't worry about it for a minute. The quality is fine and the fork is very beefy. I'd guess it was made in the same Taiwanese factory as many more expensive 'brand name' forks - but you don't have to pay for the brand.

One other thing to keep in mind is the axle to crown measurement. This doesn't vary as much on 700c forks as 26" forks but it's something to check. Also, if you ditch the canti's and go with a road fork you will probably lose a lot of wheel clearance and have to run thinner tires. Road forks might also have a smaller axle to crown distance which could affect the geometry of the bike a bit.