In The market

alright it was just my birthday so i've hit the realm of extra cash, in the range of 125 so i'm really looking into getting some different ram as i'm very sure my ram is what's holding my rig back but i don't know if there is anything in my range worth it. to feel satisfied i atleast want to get the same speeds 220mhz at cas 2 other than that it doesnt feel worth it to me.
I would rather not need a DDR booster but if it's damned good stuff rules change. as i try to be as flexible as possible to get the best i can afford.

i've been looking at a few kits

G.Skill
http://www.newegg.com/Product/Product.asp?Item=N82E16820231012
http://www.newegg.com/Product/Product.asp?Item=N82E16820231030

Patriot
http://www.newegg.com/Product/Product.asp?Item=N82E16820220006

then there was the off brand that caught my eye due to it being ddr500.....
http://www.newegg.com/Product/Product.asp?Item=N82E16820221023


thanks for all of your help in advance.

EDIT infact i didnt have the chance to check it, but a single stick of 1gb that can oc to 220 even at the timings i have now would be awesome too (expandability, ect)