manu: you can download Change Guy from:
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http://the-evil-empire.net/index.php? (need to register, downloads from different servers: Mediafire, Badongo, etc)
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http://www.mangatraders.com/manga/series/100 (need to register, the downloads are from Direct Link)
Both websites have all the released chapters, if you like shonen action giveChange Guy a shot, you won´t regret
Geeker: The mangas i read from KMTS are: Change Guy, UnbalanceXUnbalance, ID, Jjang and DollGun.
Once i tried Ares, but i couldn´t get into the art, the story looked ok.
Change Guy is my favorite one, i´m a fighting otaku so to me Change Guy is a master piece, with tons of great characters, my favorite ones by order are:
3rd - Han Kang-Ho, Kang Too-Jee, Woo So-Choi, Sa Mong-Cho, Megal Ji-Hang, Mah Kang-Chul and Han Sang-Jin
2nd - Ji Kang-Hyuk and Kwon Shin
1st - Shin Jin-Ho( he is the man

)
I really love the concept behind the characters personallitys in contrast to Woo So-Choi´s, all of his enemies are guys who live just to fight, nothing more(Kang-Hyuk, Jin-Ho or Kang Too-Jee), and cool is seeing him finding ways to defeat such monsters.
I really like Shin Jin-Ho, he look a lot like my favorite manga character ever(Shin Seijuurou from ES21), the last chapters made me like him even more, specially chapter 312, well Geeker i´m waiting for the next two chapters, i hope we can get good news...Jin Ho-s victory

lololol.
I made updates to the supporting characters section of Change Guy in Wikipedia:
http://en.wikipedia.org/wiki/Change_Guy