welcome to the Honda game! DC headers are good just get the 4-1 header and not the tri-Y crap. but get a full exhaust too! i'd suggest a motor rebuild if your going to boost anything over 10lbs ( <--- and yes i will get shit for saying this this by other members...) if your going VTEC i'd suggest the y8 or the z6 obd1 head. and you'll have to get the VTEC conversion kit, Golden Eagle makes a nice one for about $200. and the D2's are badass!

some stuff i'd add though would be
NGK plugs+wires
upper and lower strut bars
a properly routed cold air intake
hondata 4 bar MAP sensor
AEM wideband o2 Senser
Walbro 255 fuel pump
aftermarket clutch

btw now that you own a honda every fucking car problem known to man will happen to you! ...have fun.