I do not have the 1420's or the 1820's, But I can tell you that many people with the 1420's are pretty happy with them. the 1820's will be very laggy. If you want more power than the 1420's , get somthing like the JWTsport 700's.
AIM:Shawn300zxTT
"I just took 45 min and scrubbed the heck out of my rear" teambushido(San Diego, CA) 19:24:51 12/11/04
1991 Stage _ TT 5spd (Turbo Upgrade in process) 1990 2+2 Na Stage 3 Auto 11 Sec Eagle Talon Tsi AWD, Daily Driver. 2004 Honda CBR 600RR (Candy blue)