Personally, I think Simmons sucks. Every one I have had just lacked any of the lense clarity that Burris and Redfield have. Plus, you can get a good Burris 3X9 for not a whole lot more than a Simmons Aetec.
My simmons is every bit as good as my lower end leopolds,same warranty,same light gathering,and i havnt had to adjust it in 4 years of hunting/shooting.Many brands have improved thier lines to compete with burris and Leopold,check them out.I bought my Simmons after a store owner suggested it over his leopolds forthe price range i was looking in,my next scope will also be a Simmons.
I prefer Leupold. And have never heard of a smear on an inside lens, deffinately something I will look at next time I buy a leupold. I have heard good things about Burris scopes though. My brother just got an Cabelas Alaskan guide scope and loves it so far. And I have to agree it is crystal clear, it came with lens covers that screwed in (didn't really like that) but it also came with a sun shade which was nice.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...