Here are a few I liked, some of them might not qualify as obscure but rather as just not mainstream:
Shaun of the Dead - One of the best zombie movies ever made. And it's funny too.
Dead & Breakfast - gotta like Horror movies that break out into a song.
Ong Bak - Excellent martial arts film.
Haute Tension(High Tension) - Great edge of your seat thriller.
District B13 - Recent action film that rocks.
JVC RS600(Calibrated with Chromapure using an iD3), Stewart Cima Neve 2.35 115" diagonal screen, Lumagen Radiance XD, Darbee Darblet, Denon AVR-X7200WA(7.6.4), M&K Speakers, 6 ported 18" subs powered by 3 inuke 6000dsps, Roku 4, Panasonic UB-900 UHD blu-Ray player, HDFury