the 955 Phenom is much better and overclocks to 965 speed..
for the extra 20 dollars over the 9850 on tiger direct its much faster. 9850 is old tech and to be honest is no where near as quick as the 955.. the price on tiger has put the 9850 at 40 odd dollars extra
save your money on the board and put it to the faster chip, but if there is a choice between the 9850 and the x4 620 the 9850 has a slight edge on performance.. if you were to go for a x4 630 its a little faster than the 9850 but a little more expensive.
thanks everybody for your input I think I am going to stick to my original decision and go with the 620 as the recommendations are all out my price range and Yes shortstuff is right I am from Canada so the links above from new egg are all US prices which are alot lower then CDN dollar