If money is no object.. Cross hands down.  When you buy them you can choose the spring rates best suited for your application. For street you would want a softer rate and maintaining as much travel as you can is what you want street or track. Just my 2 cents. 
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'06 SB/SB MCS, JCW SB, H-sport RSB, TSW Springs, TSW control arms, Powergrid, IE Camber Plates, Powerflex, Goodridge, JCW Brake Kit, REO1R, Enkei RPF1, 15% Craven Pulley, JCW CAI, K&N filter, Brisk, VIP engine damper, Milltek, Nuvi, Helix Short Shifter, MOMO, JCW ijtrs, Jan Tune...
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