If I had to face just two choices of this nature I'm afraid I wouldn't want to see either of those options on offer; of the two however, I'd be more inclined to think Bitdefender is the more effective.
My Computer
Computer Manufacturer/Model Number
Custom built machine
OS
W7 x64
CPU
Intel Q9300 2.5Ghz Quad LGA775 (Would like Q9650)
Motherboard
Gigabyte GA-EP45T-UD3R (F6 Bios)
Memory
4Gb OCZ Gold 1,333Mhz
Graphics Card(s)
Palit HD4850 O/C Sonic 512Mb DDR3, Dual DViD's
Sound Card
Azalia to twin Samson 50w Studio Monitors
Monitor(s) Displays
Twin Dell (E-IPS) U2311H 23.6" Screens
Screen Resolution
1920 x 1080 @ 60Hz
Hard Drives
Crucial M4 SSD, archives on twin Western Digital Caviar Black WD2002FAEX, 2TB, 7200rpm HDD's, Samsung Ritemaster CD/DVD Burner...
PSU
OCZ 600w
Case
Lian-Li PC8 acoustifoamed' aluminium tower
Cooling
Scythe 140mm Zipang
Keyboard
Cherry PS/2 custom model
Mouse
Lenovo USB laser "Thinkpad" Mouse
Internet Speed
ADSL2+ @14Mbps downstream & Cat6 Gigabit Ethernet
Antivirus
NOD32
Browser
Opera
Other Info
Silicon Dust HD Homerun Dual FTA (Ethernet) TV Tuners, Dray Tek Vigor 2850Vn router and 8x HP Gigabit Switch. Lian-Li CR26 Card Reader, Canon MF4430 iSensys laser printer/scanner.
bitdefender for sure. its one of the top antivirus / internetsecurity. why. effective and very low on system usage. beside i have had it in 2 years and not one virus. and i can say that i download alot. also crap.
Tune Up Utilities 2010,
Kaspersky Internet Security 2010,
Ashampoo Uninstaller 4,
Microsoft Office Home and Students 2007 ( Free Upgrade to Office 2010 ),
Burn Aware Home Lifetime Upgrade,
WinRar 3.9 64 Bit,
Adobe Photoshop CS4 Extended,
Monodevelop,
Nitro PDF Professional :-D
Microsoft Security Essentials, is EXTREMELY POOR PERFORMING WITH 0 ADVANCED FEATURE SET.
If you have dough, go for paid suites. They have PLETHORA of capabilities.
My Computer
Computer Manufacturer/Model Number
Dell Studio 15.6 "
OS
Windows 7 Professional 64 Bit English
CPU
Intel Core i5 540M Processor, 2.53GHz~3.06GHz
Motherboard
Dell
Memory
6 GB ( 1 X4 GB 1 X 2GB ) Dual Channel DDR3 SDRAM
Graphics Card(s)
1GB ATI Mobility Radeon HD 5670, DirectX 11
Sound Card
Creative Xi-Fi
Monitor(s) Displays
15.6 " 1080p WUXGA WLED FullHD Display
Screen Resolution
1920 X 1080 FullHD
Hard Drives
500 GB SATA Hard Drive, 7400 RPM
PSU
Dell 9 Cell Battery
Case
Derek Welch Horizonte in Blue
Cooling
Cooler Master Color Infinite Laptop Cooling Pad
Keyboard
Dell Backlit Keyboard
Mouse
Dell Bluetooth Travel Mouse
Internet Speed
10.0 Mbps Leased Line @ Institute
Other Info
Tune Up Utilities 2010,
Kaspersky Internet Security 2010,
Ashampoo Uninstaller 4,
Microsoft Office Home and Students 2007 ( Free Upgrade to Office 2010 ),
Burn Aware Home Lifetime Upgrade,
WinRar 3.9 64 Bit,
Adobe Photoshop CS4 Extended,
Monodevelop,
Nitro PDF Professional :-D