honda crx spl recommendations

ok heres what i got so far. 2 l7's dual 2 ohm and 2 hifonics 2000rms each.

heres the new problem i ordered the ports and got only the inner and outer flares the tubes are on backorder. they wont be in my hands until after one of the shows im planning on attending.

would you recommend using a slot port. if so what would the dimensions be. jeff you said that a common chamber with 2.5 cubic ft is what you recommend. how did you come up with that figure is there a mathematical approach or have you already gone through all the trial and error. im having trouble coming up with box dimensions that included 12 inch long ports without using elbows. can you help me on this one. 2.5 seems real small does it make a db difference if its a bigger box tuned at the same frequency.(dont worry i plan on building what you tell me to. from everthing ive read on these forums your the go to guy for spl, i just like to learn as much as i can)

another question i have is- if  i run one amp at 2 ohm while im running sweeps and tones will this still give me my peak frequency as compared to running two amps at 1 ohm and the running tones in that freq range. or would it show different peaks. any other advice is welcome.

i also have a new in box epicenter. would this help, hurt, or wouldnt make a difference during comp.

thanks for the advice on the amps.