Kleiza isn't even much of a risk; there's probably a reason the Nuggets don't want to trade him, and it really, really lies with his potent scoring ability. I've read somewhere that one of the Nugs' teammates said that Kleiza always looks to be on the verge of exploding for points...even when he's not playing well. He's a pretty lethal offensive player--at one time this year, he was the best 2-pt shooter in the NBA (yes, as an SF) and now his three point shot is catching up to it, and don't forget his ability to get up for jaw-dropping dunks and his ability to slash to the basket. There's a lot to like about him if you want an offensive player, because he has really few flaws, takes smart shots and generally has a varied offensive game. Even had a 40 pt game this year. Very tough minded as well. He's probably certified to thrive in virtually any system.
If we do trade Artest for Kleiza and extra change, I'd say that Kleiza may split minutes with Salmons and Garcia at the SF at times, and get some run at PF. There are concerns about his defense, however, so I'm not sure if he addresses those issues for us--and while we may need more offense with Bibby and Artest out--he doesn't address much of our weaknesses, and probably amplifies our strengths. I've said in the other thread I've liked Hilario better for that matter, but if we do get Kleiza, he's very low risk, high efficiency, so I wouldn't mind at all.