So I can't decide if I should get the cheaper kyb gr-2 ($160) struts or the more expensive kyb agx ($400). I would get the konis but to much money. So between the kyb's is it worth the extra $240 for the adjuatble? I would prefer adjustable but does the performance improvement from that? Or should i save money and get the gr-2s.

 

The GR-2 are basic stock replacement. If you want any performance improvement, don't get these. The AGX is a much better choice. Not sure where you are shopping for these but shock warehouse has the AGX front struts for $120 each. by your numbers this is $80 more and yes well worth it. I used the KYB gas-adjust (which are not a manual adjustment) on the rear and those where $33 each. So for just over $300 I got all 4 and I am very happy with the choice.