Here on Volumio I found quick overview of b vs b+, and it says:
Audio purposes will benefit of that upgrade (unless you’re using a wlan stick, a USB Hard Drive and a USB DAC, but this is the kind of situation I’ll desperatly avoid with the little PI).
This is actually exact way I was planning to do
Would you please explain what is a problem then ?
Buy the model B, none of the extensions on the market will fit to B+.
Or you wait 2-3 month.
But there is no issue whatsoever of handling simultaneously hdd+wifi+usb dac ?
Wifi is optional, I ll wire rpi to router possibly.
Another question: how often would I need to use keyboard? Once I set up the system it can be disconnected and I can forget about rpi hidden behind my tv ? 
If everything works fine - yes
You are the man!
Getting B
Only had pops, clicks and stutter when using a USB DAC, not a single one since switching to an I2S DAC.
Dont know much about digital.
Rpi via usb to xmos to i2s ak4399 is my set up
As the IQaudIO Pi-DAC has been a huge success bringing super HD audio playback to the Pi we’ve already started on the B+ support board.
We got our B+ Pi’s Tuesday and yesterday we proved all is working as expected so layout on the new PCB has started.
Hope to have Raspberry Pi B+ specific Pi-DAC boards in the near future.
Will keep you all updated.
I didn’t think a keyboard was needed at all? Can’t it all be done from the web interface?
If all works well and you need no extra software or drivers - no keyboard is needed
So, having usb to xmos to dac really is USB DAC implementation and I may possibly have issues with signal?
Received yesterday rpi.
Put volumio (simple!)
Question: was I doing something wrong with it, having laptop connected to wifi and rpi via ethernet- I could not see volumio in laptop browser.
Only after connecting laptop to lan and disabling laptop wifi I could see volumio.
How to do then volumio on wired network and laptop on wireless ?
Hi voxxonline,
Just ensure your wired and wireless interfaces are on the same network. Do they use the same router ? If yes you can access the Volumio UI from your laptop via wireless.
yes, same router same network
will try again