well its gonna cost more than you would think and i would suggest getting a adjustable coil over setup so you can adjust it just the way you want. a lot of people just get springs but most of them are not happy with how it is. its either to low or to high.
these are not to bad: http://cgi.ebay.com/ebaymotors/FUNCTION-FORM-TYPE-1-COILOVERS-INTEGRA-90-93-DA-NEW-_W0QQcmdZViewItemQQfitsZMakeQ3aAcuraQ7cModelQ3aIntegraQ7cYearQ3a1990QQhashZitem3a52ed70e6QQitemZ250499395814QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories#ht_1374wt_897
these are ok to: http://cgi.ebay.com/ebaymotors/SKUNK2-FULL-COILOVER-SUSPENSION-KIT-ACURA-INTEGRA-90-93-_W0QQcmdZViewItemQQfitsZMakeQ3aAcuraQ7cModelQ3aIntegraQ7cYearQ3a1990QQhashZitem5196007208QQitemZ350408962568QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories#ht_2911wt_939
i will tell you this. some people like certain setups and others hate them. a lot of people are finding koni yellows struts(cant adjust ride height) and ground control coil overs to be one of the best setups with an option to get top hats to go even lower and still have decent ride. its really up to you and how much you wanna spend
EDIT: look at the poll lol this will tell you how popular the setup i said above is.
http://honda-tech.com/showthread.php?t=2554074
also some more info. looks like a lot of people are going with 350 front and 300 rear spring rates for a good daily driver with the adjustable damper on the strut set to soft. i myself will be switching to koni's if i keep my hatch