Could get the AMD 260 3.2GHz for $8 more. This is a hard deal to pass but not required if you are really tight on money. OEM versions don't come with a cooler or a box. Only worth it if you plan to overclock from the start and already are getting an after market cooler. The main reason for OEM is so that you don't pay for the cooler you won't be using.
The motherboard has core unlocking features so if you're lucky, that Athlon II x2 might become an Athlon II x4. Even getting one extra core will be well worth it. Has onboard Radeon HD 4250 which is one of the best IGP right now.
I highly recommend 4GB of ram even for an office PC because some programs can be very demanding and it will ensure the PC will last a long while. Part of the reason is also because the motherboard only has two RAM slots, which is one of many factors why it is cheaper than usual.
Just get the cheapest generic SATA dvd burner you can find with free shipping, preferably on newegg or similar site because you wouldn't need to pay tax. They all work the same and seldom have any problems. Asus, Sony, LG, LiteOn and Samsung are all good brands. They should be less than $20.