Referncing a price to get the part

I have this spreadsheet that I use for quoting a custom build computer. the options are on the side of the sheet and I want it to automatically add the corresponding part into the system list, I need this to be easily updated and adjustable for different base systems and new parts.

I just cant get the formula right for it to display the part name in the A column depending on the price entired into the E column. the reference infomation is on the same sheet (part name in the G column and price in J) I have more parts listed in K column and the prices for those are in the N column. I just it to do the reference the different models of the parts not all parts on the sheet

the sheet is in excel 2007 format