My First Full Song Including Vocals, need recording tipps though... Options

[Gitarrero]

Hi guys!

So, two weeks ago I suddenly had this song idea including the chorus vocals in my head. It is a song about bits of the story of Diablo 3 (spoilers if you haven't finished it ), and I also took the intro from a D3 cutscene (hopefully Blizzard won't sue me now).
The song is in drop C, and I'm really happy with the instrumental part of the song.
Now, for the vocals I used the X-Orcism plugin (thanks Todd!). My setup was as follows:
I plugged my microphone into my Behringer V-amp 3 cause I don't have a chance to plug it directly into my PC. The V-amp3 is connected via my usual USB device to the PC, which I also use to record guitars.
The mic signal that arrives in Reaper is really low, I have to crank the volume up completely. I also have to use a pre-amp and much gain in the V-amp. So there is already gain in the signal. On top of that comes the X-Orcism plugin. I also "sang" or spoke pretty loud into the mic, which leads to some clipping.
So, what would you guys suggest? How can I record vocals properly at home?

Here's the song now:

http://soundcloud.com/gitarrero/the-prime-evil

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