If you are really worried about arrow length, you can always rig up a "dummy" arrow with a dowel or something and mark it where you want it, and have some arrows cut for that length. I've honestly not one time measured my arrows, always just cut them according where I want them when at full draw. Because I have to shoot telephone poles with a 32" draw, I cut mine as close to the rest as possible, but with your draw, that is not necessary.
As for your sights, what Swamp said is VERY true about good reviews. This website is a perfect example of that, bad word travels way faster than good. So, if you read a bunch of good and no bad, you can be pretty confident that you are getting a quality product. I'm a Spott-Hogg man...except my one Copper John. I like them both, the Spott is built a little sturdier though.