More Power or use subwoofer to boost bass for music


Hi,   just want to know if anyone can offer their opinions on how to boost the bass when listening to 2 channel music.

I just got a pair of B&W 804 D3 and would like to get more bass out of the speakers.   I remember the bass was pretty punchy when I heard it in the dealer showroom, but I don't seem to get that in my setup.   I currently have Parasound A31 power amp with 250 watts per channel.

So the question is whether I should get a more power amp, or add subwoofer to my 2 channel music.  I'm a little bit of a purist and would prefer not to use a subwoofer for music, but I'm open to this option.

I would definitely appreciate if anyone can share their experience/opinion.   Thanks very much.
128x128xcool
Are any of you listening to yourselves?? Really??
Yes, we non-cult-DBA-knowers are- however you might want to take a dive into the research. Put another way, you know how you are sounding right now??
Start with 1 sub: 2 would be better: REL, Martin-Logan or JL would be great options. Doing a more powerful amp may lead to frustration. The subs will give you more flexibility and adjustments to compensate for room variations.
Ralph :

 I have nothing against 4 subs. They are technically a good idea.

What I have a problem with is the cult that they are the one thing that should be discussed when a poster asks for help with a little more bass.

That is the cult. 

It's like some one who won't go to the store to buy a bag of rice because all they have is a Mercedes and the Ferrari is in the shop.
Post removed 
I would start with a better amp and attention to placement. Regardless of power specs I think they deserve a better amp. After that I would consider sub(s). A pair of 6.5 inch drivers in a relatively small cabinet can only put out so much real bass at real volume out to the listening position.