replacing the peavey 410 TX cab. it is rated at 700w handling and 300rms oh and its 8 ohms... so a couple if things..... speakers are not bad, but they are not the best. i plan on keeping this baby around for ever anyway, if i do replace all speakers, what would be the best so i can retain my same specs on the cab? also could i get speakers and wire it to 4ohms would that be louder (450w head) or would i be better off sticking to the 8ohms and getting a second cab, which would be a 15. but right now my main concern is getting the best speakers possible. thanks.