In my experience, i think its important to set a total budget for a hifi system. Balance is key in not to waste money on components that will either be an over or under match in the whole kit assembled. Also, i think its very important to try the desired new components in your listening room. Acoustics, size of room and familiarisation of the sound you are used to hear will make decisions easier...Some speakers may sound great in the showroom, but at home it may sound very different...room acoustics are a big variable...Also, i did not beleive in the importance of cables and power source....they make a very important impact and i think should be evaluated in the total cost of the desired kit...Just my 2 cents.