After market cooler for am2+ socket

hi
i need a good after market cooler for my AMD Phenom II X4 920 2.8GHz.
(http://www.newegg.com/Product/Product.aspx?Item=N82E16819103472)

Its socket is an AM2+ so im thinking about getting the XIGMATEK Dark Knight (http://www.newegg.com/Product/Product.aspx?Item=N82E16835233029)

is that a good pick, i will do a minor overclock as to keep the life span of the machine decently long. if i do get that cooler, would i need the retention bracket?
or should i get a different CPU cooler.
EDIT: crap... just came into realization that is indeed the wrong sub-forum place to ask. could a mod move this for me? i dont want to create 2 topics.

Yes +1 on the zigmatek dark knight s1283v + get Arctic Silver 5 thermal Compound

or Arctic cooling mx-2 thermal compound

Actually, the dark knight comes with a higher rpm fan, which makes for better cooling.
That said, I have the normal S-1283, and its fine as well.

Here is another excellent cooler that you should check out, at a great deal at $32:
http://www.newegg.com/Product/Prod [...] 0mugen%202
Unfortunately frostytech hasn't done a review on it so its tough to say how it stacks up against all the other coolers out there, but in some more limited comparisons (of just a few coolers) the Scythe Mugen 2 performs extremely well, especially if you stick 2 fans on it. Its right up there with the S1283 and TRUE...for $32.

or you could get an IFX-14 + IFX-10 with two fans, it would weigh like 1KG but you'd get 4 or 5c less than a U-120 eXtreme.

If you get the Original Xigmatek s-1283, make sure you buy the brackets that are seperate from it, those push pins that come with it are a pain in the arse. There a struggle and feels like your going to break the board just getting it on there.

+ they vibrate out of place occasionally if you ever decide to put it in the car and take it somewhere.

so us AM2+ socket users have better luck with this?
http://www.newegg.com/Product/Product.aspx?Item=N82E16835207004