Another to consider is the Kwikee Kwiver Combo. It's a detachable 4-arrow, much like the fast 4. I've had the same one for the past 3+ years and it's still almost like new in all regards, meaning it's very rugged. It's also very quiet - never had any noise come from it. I also like that it has two arrow grippers and handles "regular" size and small diameter shafts.
2008 Martin Firecat Pro-X (29" DL, 66# DW), home-made TRG, new VEMs, DS Advantage/HHA Pro-5519 front sight, No-Peep Sight Eliminator, Limb-Driver arrow rest, B-Stinger stabilizer/dampener, custom upper STS, G5 Head-Loc quiver on custom mounting bracket. Gold Tip Velocity XT300 arrows with Bi-Delta 2.5" Sharkstooth vanes and Grizzly single-bevel broadheads, 498 grains at 262 fps (22% FOC)