whats available for the NX2000 for a good price are: Eibach springs, H&R springs (hard to find) and Ground control makes the adjustables. There are some companies that sell real nice spring/shock setups, but for some big $$$. Shocks are as follows: Tokicos, KYBs & KYB AGXs (adjustable), GAB (BIG $$$) adjustables. Suspension Techniques anti-roll bars. Energy suspension black graphite Polyeurothane bushings.
spot on bloke. The NX2000 & 1600 use the same suspension setups with different rated springs. Those 2 cars can exchange parts, but after calling some of my suspension suppliers I learned that the SE-R parts are different.