rebuilding sr bottom end

[timtiminy]

hey guys i had a few questions about rebuilding the SR20det's bottom end. the bottom end that i am getting has one piston with the edge chipped off (ring land snapped?) i was thinking on possibly just getting a used piston for that one cylinder and replacing the rings on all 4. I am only looking to get about 300whp so I dont see a need in getting forged internals. But I was thinking about just doing cryo treated, new oem pistons since i would have everyting apart and can't cryo pistons that are already used and stressed (i dont think...) anyhow i was looking at courtesyparts.com nd saw that there are quite a few piston choices (just wondering if anyone knew the differences (grade #'s and the vvl one) looks like the vvl one is the cheapest... SR20DET Piston/Std(Grade #2) (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=A2010-00006&Category_Code=)
Code:A2010-00006
Price: $50.00
Quantity in Basket: none



SR20DET Piston/Std(Grade #3) (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=A2010-00007&Category_Code=)
Code:A2010-00007
Price: $50.00
Quantity in Basket: none






SR20DET Piston/0.2mm/.008" (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=A2010-00008&Category_Code=)
Code:A2010-00008
Price: $50.00
Quantity in Basket: none



http://www.courtesyparts.com/Merchant2/graphics/00000001/sr20det/A2010-00009_t.jpg (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=A2010-00009&Category_Code=)SR20DET VVL Piston (1) with Pin (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=A2010-00009&Category_Code=)
Code:A2010-00009
Price: $40.00
Quantity in Basket: none

[timtiminy]

okay so it looks like i will probably just go with getting a used oem piston and change the rings out on all 4. any suggesions on rings? or should i just go oem rings?