Gadget Deals of the DaySThe stock market may be shrieking in pain, but you can drown out the agony by shopping for great deals on audio equipment. We're talking about an Onkyo surround sound system with six speakers and a receiver for under $300, or maybe a set of JVC noise canceling headphones for under $40. Close your eyes real tight and blast the ABBA, because you're about to save some big money money money money. (OK, maybe just three monies, but definitely more than two.)Audio accessoriesJVC HANC100 Noise-Cancelling Headphones for $37.97 (originally $99.95). • JVC HANC250 Noise-Cancelling Headphones for $105.97 (originally $199.95). • Beyerdynamic DT 770 Stereo Headphones for $113.77 (originally $319). • Panasonic RP-HC500 Noise-Cancelling Headphones for $90.65 (originally $199.99). • Slip Profile CD System for $89 (originally $125). • Denon AVR-988 Multi-Source/Multi-Zone Home Theater Receiver for $584.97 (originally $1,199). • Onkyo TX-SR705 7.1 Home Theater Receiver for $479.97 (originally $799.99). • Sony HT-SS2000 Component Home Theater System for Blu-Ray Players for $316.99 (originally $499.99). • Klipsch Home Theater System with DVD player (set of five speakers) for $692.04 (originally $999.99). • Onkyo Home Entertainment System (includes receiver and six speakers) for $289.99 (originally $399). GamingRefurbished Guitar Hero III with Wireless Guitar for the PS3 for $29.99 (originally $69.99). • Refurbished Guitar Hero III with Wireless Guitar for Xbox 360 for $29.99 (originally $69.99). • PlayStation 2 bundle with Lego Batman and Justice League for $129.96 (originally $149.99). Cameras and accessoriesCanon PowerShot A460 5mp Digital Camera for $89.99 (originally $199.99). • Patriot 8GB SDHC Memory Card for $9.99 (originally $39.99). Unlocked cellphonesMotorolla's A1600 Ming for $369 (originally $699.99). • iMate's Ultimate 6150 for $399 (originally $619.99). • HTC Touch P3452 for $339 (originally $429.99). Stocking stuffersVictorinox Swiss Army Champion Plus Pocket Knife for $19.99 (originally $78 - valid only on 10/24). • Disney Princesses DVDs/Blu Ray up to 50% off (originally $29.99 to $34.99). MiscellaneousLux Touch Screen 7 Day Programmable Thermostat for $64.95 (originally $137.17).