i use one jaycar 2x80 for splits, and 2x250 for sub, i use the sub amp bridged to feed an image dynamics 12" sub 500wrms, and have no complaints.
no issues with the 2x80 for the splits either.
only issue i have is the 6.5' splits, fair enough for the money u cant really get any better, but in absolute terms, i believe they are bad.
midrange is OK, but the tweeters are wayyyy to bright and sound harsh, maybe a customised crossover would help.
also the crossovers for the splits are in unnecesarily big cases, i had to trim one to fit it anywhere