I have two pieces left to upgrade in my home theater, my receiver and my sub. I am pretty set on buying the HK AVR 635 and a SVS 20-39 sub. The costs of each are pretty close to the same. My question is which should I upgrade fist? Which one will give me the most noticeable difference? I watch mostly movies and digital cable and listen to very little music. My current JVC 5.1 100watt receiver does an alright job but is definitely lacking in video connections and I am sure it is also lacking in power. I am still able to run my DVD player with component cable and my digital cable with S-video cables. My JVC 110W 10" sub is boomy and definitely a weak link in my system. My room is 25X10 with 8' ceilings. I am on a limited budget and should be able to purchase one of the two by July and then the other before next year. Any suggestions would be greatly appreciated. Thank you very much and I can tell you this forum is a savior for us beginners.