Home cinema or hifi amp ???

Hello
I just bought a new pair of Boston VR2 and am now looking at buying a new amplifier. My current hifi set up is Luxman L225 (1987), CD Rotel RCD930AX and Allison LC speakers(1987 vintage also).
With the appearance of AV amps, I'm hesitating : buy a 5.1 amp, use my Allison as rear speakers and possibly add a central front speaker later. That's good option for home cinema, but I would hate to sacrifice hifi quality just to better enjoy my DVDs. I'm sure it's possible, but my understanding is that you need to spend quite a bit to get an AV amp that matches good quality hifi amp.
I don't have a clue on how better the XXIst century amps are compared to my jurassic L225....
My questions are :
- for a pure hifi set up, what are the recommended amps for the Boston VR2. I heard NAD (e.g. C320 BEE) or Denon would a good match. I listen to mostly jazz, rock and some classical. budget around 300 pounds
- for a home cinema setup, budget would certailnly be higher if I add a central speaker. But what would it be for a good balance between hifi and home cinema at, say 400 or less for the amp alone?
Any other comment, experience appreciated