Standmount - Seas with ScanSpeak

[barackuda]

So here is the dilemma
Seas G18RNX/P + ScanSpeak D2905/970000 in a 15L box.
What would you do? Active or Passiv? Closed or Vented?
If Active whitch would you choose?
If Passive simple 6dB or top class what walet can handle?
If Active, would you go for a single amp for each driver or one stereo for bass and one stereo for tweeters?
Valve amps or standard?

I would like to get the most out of these speakers, and the posibilities are endless..........

Mostly i listen to Jazz, Blues and acoustic music, volume levels intermidiate ( so you can hear yourself speaking ), room size 4x3m (12,5'x9,9').
I preffer smooth sound.Not to much technical......

Appriciate any suggestions.....

Thanks folks.

Doh!!!! the 15L is calculated for vented, but any furder tweeking posibble.....