Hi Scorer - if you are already shooting with the T3i, you probably already know that it loses both autofocus and the viewfinder in video mode, that it won't shoot over 12 minutes continuously, that it has no way to set sound levels and that it has a tendency towards moire when shooting complex, patterned objects such as brick work, shingled roofs and patterned fabrics.
If you're OK with that, they're on sale right now, with the kit lens, for
$599 at Amazon.
If you're not OK with that, you might want to look at the
$749 Panasonic GH2. The autofocus and the viewfinder continue to work in video mode, it shoots essentially unlimited length clips (no artificial 12, 20 or 30 minute limits), it has 4 step audio level control, the autofocus on video-optimized Panasonic lenses is silent, and it is far less susceptible to moire than the Canons - see these examples (GH2 vs Canon 60D):
https://vimeo.com/20565849
https://vimeo.com/21962491
And here is what the GH2 can do:
Roberto Miller - US
Mandorla anamorphic narrative trailer - (hacked GH2):
https://vimeo.com/40844162
Gami Orbegoso - Spain
Musgo narrative trailer (hacked GH2):
https://vimeo.com/33025136
Gami Orbegoso - Spain
Musgo intro - first 5 minutes (hacked GH2 - caution NSFW):
https://vimeo.com/45596420
Ryan Elliott - US
Unattended narrative short - (hacked GH2):
https://vimeo.com/41379315
Harvey Walton - UK
Salome narrative short (hacked GH2):
https://vimeo.com/34569159
Stephen Nguyen - US
Dysphoria narrative short (hacked GH2):
https://vimeo.com/42892833
Michael Tsim - UK
Blacks spec commercial (unhacked GH2):
https://vimeo.com/42204451
J. R. Dise - US
release anamorphic narrative short (hacked GH2):
https://vimeo.com/42252615
Gunther Machu - Austria
Oh Angkor documentary (hacked GH1/GH2):
https://vimeo.com/42107369
Hope this is helpful,
Bill