I've got a Sequoia Elite, and early on I took off the little bar-top cheater brakes and put aerobars on in their place. I do long rides, up to centuries so far, on this bike, and so far it is treating me well.
I dream of upgrading, but I've had this bike since 2004, and I am developing more personal opinions about what I would want, and why. However, the fact is, the Sequoia has been a great first bike for learning a lot of the ropes. It is pretty comfortable and stable for long rides.
Of course, fit is key. I can do a century on it without having a sore neck, etc, afterward, and did a couple centuries just fine before I put the aerobars on (although I do love my aerobars, despite getting questioned about why I really have them by many, many men working in bike shops). I ride alone almost all the time, and I just love the aerobars which help me on solo rides with a lot of headwind. They also not only give my hands a rest sometimes, but when I sit up and put my hands on top of the elbow rests, I can get yet a different body angle to change it up for climbing.
Anyhow, if the Sequoia fits, it will be great for a century!
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury