I use Antec Fusion HTPC case for almost 2 years now, extremely happy with my choice.
Antec - Fusion Remote Black
I use passive Ninja heatsink on Core Duo, HD3750 card and laptop hard drives. Totally silent. Plays any HD content I need.
Also, I downgraded to XP and got much better performance playback for BluRays.
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Venom Build: Caselabs SMH10,
3930k, 2x
GTX680,
MSI BigBangII, 8x
Dominators, 2 x
D5 ,
Quad Rad, Adaptec 7805, 4x WD Red, 2x Intel 510,
Aquaero 5, 11x
GT Silent Sniper Build:
Final Video,
XSPC H1 Cube case, Supreme HF, 2xGTX470, GA G1 Sniper, Dominators, 2x Triple rad, Triebwerk Fans, 2x D5, Custom Sleeving
Orange Build:
Final Video HTPC Build:
Final Video