What reason do you base the fact that if Swick could beat Franklin he could [u]DEFINITELY[u] beat Silva? Silva dismantled Franklin and Leben. Swick lost to Leben. Swick looked average against a nervous Loaiseau. When Loaiseau started to press the action Swick looked like he wasn't ready for someone on his level. The MW division does not have an answer for Silva right now. Lindland would be a good match-up because of his wrestling ability. i think If Fitch could move up and fight well at that weight he would be a good match-up.
I think it is more likely for Mike Swick to die in the ring than it is for him to beat Anderson Silva.
The only style that Silva doesn't have an answer for is a dominant wrestler. Look at the fight between him and Ryo Chonnan.