I've been using a Propellerhead Balance for a while and though it loves Reason it doesn't love Sonar. I had to restart it many times trying to work in Sonar today (a warning comes up that there's no audio device connected) so I'm shutting down Sonar, messing about with stuff, booting up Sonar etc. It is not a good work flow!
Anyway, I've been looking at a Focusrite Scarlett 2i4 USB Audio Interface to act as the input for my Ibanez and the output for my Rokits. I don't want the 2i2 as it doesn't have the pad button (or midi but that isn't a deal breaker and I don't want to spend any more than the 2i4 costs.
Is anyone out there is Sonarland using one and if so does it bring happiness and good results?

Grum.

I do have it and it works like a charm, go for it
Ufo

Another thumbs up here. I had an M Audio fastback first and was getting bursts of white noise on playback and crashes but huge improvement with the Scarlett.

ufostraker64
I do have it and it works like a charm, go for it
Ufo

Good to hear. Are you totally happy with noise (as in quiet!) and latency?

Grum.

If you are using a desktop PC you are never getting best latency with USB, PCI(e) is the way to go for best latency assuming mobility isn't an issue. I still use an maudio delta pci and it is useable at 96k 64 buffer for a total roundtrip latency of just over 2ms, even the best usb (probably RME) you are looking at 5ms with most usb interfaces being at least 9 or 10 ms at best.
 
It all depends on what you are doing really and lots of people say they cant notice 10ms latency, I definately start to notice at around 7 or 8ms.

I've got the 2i4 and the 8i6, both have worked very well for me.

Greeny
If you are using a desktop PC you are never getting best latency with USB, PCI(e) is the way to go for best latency assuming mobility isn't an issue. I still use an maudio delta pci and it is useable at 96k 64 buffer for a total roundtrip latency of just over 2ms, even the best usb (probably RME) you are looking at 5ms with most usb interfaces being at least 9 or 10 ms at best.
 
It all depends on what you are doing really and lots of people say they cant notice 10ms latency, I definately start to notice at around 7 or 8ms.

I don't find I'm that sensitive to minor latency (but there is a limit) plus my timing isn't great so most things I play (on guitar) are going to be edited after I've played anyway!
I've always used USB interfaces so I'm sure I'll cope.
The other option is the Pro 14 but I'd have to fit a firewire interface to the pc plus the reviews don't give massive confidence in the that product.
I'm not panicking so we'll see what happens on the next few days.

Grum.

MakeShift
I've got the 2i4 and the 8i6, both have worked very well for me.

Good to hear . I'm getting the feeling the 2i4 could be the one.

Grum.

I have the 2i4 and it works wonderfully.  I blogged about it (in part):
http://www.mamf.ca/blog/evolution-of-my-home-recording-studio
 

https://www.gearslutz.com/board/reviews/906141-focusrite-scarlett-6i6.html
 
I went with the 6i6 for reasons I go over in my review. 
 
There is no tracking latency with any interface as they all use direct monitoring. Tracks are perfectly in sync.