Changing the Audio Equipment

Sorry for all the questions, at the tweeters easy to change? and do you think its better to get a new component system, or just replace the coax's and the tweeters? :smile:
 
pioneer TS-Q131C which replace the fron speakers and tweeters, the tweeters abit of a bugger to get the covers off in one peice but can be done, and i just got some pioneer speakers that matched the colour of the front ones which were TS-E1376 13cm 2 ways.