Hello audiorookie
Sounds like you are assembling a nice little system . Should give you an improvement in sound quality in every area . One thing you may want to consider is the output power of the VSi60 , you have likely read Bob Reina's review in the Sept 2010 issue and noticed the output at 8ohm is 53 watts and only 44watts at 4ohm , that might be a little light for the Synchrony's if you listen at higher levels or in a large room . If not every thing should work well together . Don't forget to save some green for cords and cables to fine tune your music maker . It's hard to comment on the difference in sound from your current system , but increased detail and bass output should be a given .
Have fun and let us no how it works out . Tim