Is your buddy concerned about what others may think of his rig? You know the type I mean, the kind that turn their noses up at low cost equipment. If he is sensitive to this kind of crap you might want to steer him a different direction.
Pentax just came out with a line of scopes called the Gameseeker. All of them are fully-multi coated and have lifetime warranties. This 4-16x50 is $118.95. Its a bit more than the WTC, but may also do the job.
http://www.riflescopes.com/products/89717/pentax_4-16x50_gameseeker_rifle_scope.htmA lot of guys on Rimfire Central like the Bushnell Banner 6-18x50 which is also a hundred bucks or less.
Another scope to consider is the Mueller APV 4.5-14x40. This scope is excellent for the money. $115 shipped. Fully multi-coated, AO, nice and clear, etc. I have one and love it. In fact, this is THE scope for that rig, usage, and price range. The APV optics blows the WTC away
As to the Mossy ATR vs. the Stevens? I like the Mossy, but it doesn't come in 223 yet. I played with one at Walmart awhile ago and thought it was poretty darn nice for the money. There is a guy that posts here named Evoc One who has a couple of them and they sound like a great deal.
Let us know how it turns out.