I have converted to a Black Templars Army... They are both fun and effective. Good to play something with more of a soul then a generic codex chapter.
The painting was an easy conversion.
I have 2 full Crusader squads
2 full Assault Marine squads
Various Sword Brethren (or painted like it)
several Independent Characters, champion, Chaplain, ect...
I really enjoy it., much more so then the Sable Swords.
I am also debating scrapping the bug idea, and playing Tau instead. As I already have one very close-combat oriented army