I'd have to disagree on a few fronts.
First, there have not been any major issues with Ballistix in quite awhile, last time i heard of any issues was when they were selling the single sided ddr2.
The Antec two hundred case has decent enough cooling to deal with the heatsink on that video card...the 5xxx series run relatively cool anyhow.
The CPU is fine for gaming, many games really shine with a quad over a tri core. As far as unlocked multiplier...when overclocking on air with a decent motherboard such as that MSI board, you're not gonna get any different clocks with an unlocked multi over a locked multi i wouldn't think.
For the price...that combo is not a bad deal, there is one thing i don't like, and that is the power supply since it is one of the cheaper antec Basiq units...but even then its still a decent power supply.
Personally, i would go with the following over that combo though, as it nets you a 5830 and a Phenom II X4:
ODD+PSU:
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.418942
Case:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119203
HDD:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822152185
Display:
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236053
Mobo+Memory:
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.424686
GPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814161327
CPU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103656
OS:
http://www.newegg.com/Product/Product.aspx?Item=N82E16832116754
It comes out under a grand including shipping.