Speakers and depth...

Get newer amp.Use NAD in second sytem.If you can swing Unison Unico or Pathos Classic II (both hybrids with 75 wpc+/-) or my EAR 324 with 40 watts you'd have better sound for newer speakers.Always comes down to money right?Good values in efficient speakers include Silverline and Hyperion,some like newcomer Zu.Instead of B&W 805's (I used to sell them till 2001) I'd pick Revel monitors.If going for broke stick Brit and get Harbeth.But for value look at Usher 719's,Silverline,Totem,Quad etc.Give a budget.One thing I find is a real fine room treatment (other than ASC tube traps which has low WAF) istreating wall Behind speakers with sonex tile,wood diffuser or even a rug.But as always these choices are deiced by budget and what's nearby to hear unless you want to follow us or online mags.I like 6moons choices even though they leave out some I like (There hot on Gallo's with you can get for less than $2K,have incredible wide dispersion tweeters,and decent 35Hrz bass and 20 hrz with added $1K amp).But again look for spending some bucks on companies mentioned that offer a lot for buck as mentioned above.
Cheers
Chazz

Dipole or speaker with rear firing tweeter might be good.Look at Emerald Audio C2's a tweekgeak.com.Just wanted to add a bit with my list I just got a $1400 self amped pair of Quad 11l's and hey are fine (great deal on ebay $400 for $1400 list)Their 12L amped or larger 21/22 speakers are good values.Also in that list always thought NHT put out good lower end products ad hear new line is very good.If you want to pull speakers in for near field small collum speakers like Audio Physic Sparks are in that group.Same fo narrow totem Staff.II had a par of friends Sparks for a while and they had great sound ,different dispersion (really good for long wall) and were small and light so one could easily pull into room.
Chazz