Audio input latency

Thanks, Guys...that definitely points me in the right direction. SO many of these audio interfaces out there. Learning alot here! :)
 
Appreciate the assist.

A dedicated audio interface will probably mean losing the USB microphone. The will definitely be the case if there are any plans to use the microphone and monitor through the interface in ASIO mode at the same time.

Yeah, I'm not attached to the USB microphone. It came with a RockBand game some time ago, but pulls up as a Logitech USB microphone. I've tried a couple of others and the latency issue persists. From what I've read across web boards, the on-board sound card isn't going to give me what I'm needing, so the FocusRite looks to be the way to go. 
 
This Focusrite 2i4 bundle on Amazon looks to be the direction to go...
 
http://www.amazon.com/gp/product/B00BW90Z8A/ref=gno_cart_title_0?ie=UTF8&psc=1&smid=A2JP8H9SSVETMS
 

I would probably try Voicemeeter before ASIO4ALL were I needing to connect a USB microphone to a DAW in ASIO mode. Fortunately, I have not been in this situation.

Thanks, Bob. Appreciate your assist here. My 2i4 bundle should arrive on Tuesday. Can't wait!

To bring us back to the OP question, here's what I do.
 
Even though MOTU offers a limited, but VERY low latency monitor console, I still prefer to track, say, vocals through the Echo in Sonar.
 
The Echo latency is high when the buffers are set high, but also when plug-ins require compensation for their own processing delays. However, I wish to use compression when tracking sometimes. It allows a singer to force their vocals a little less sometimes, or just dig into the track a bit more, where timidity is a problem.
 
After lowering your buffers to 256 or less, click the PDC button to disable the plug-ins. See if this improves the Echo latency. If it does, uncheck that button and manually disable all the plug-ins you really don't need for tracking. Only enable the plug-ins you want to use to track.
 
Also, I've noticed at times, Sonar will intermittently exhibit far more echo delay feedback than other times. If I hear echo delay feedback, where I haven't heard it before, I can try a few things: Merely stopping the Audio engine (waveform button under the counter in the Control Bar), re-enable it. Or, I may disable the Echo button and re-nable that. Other times, I can stop the playback/record function and start over. I don't know what gets Sonar in this state, but it's still a problem I deal with regularly.
 
you may also try freezing all your other tracks, then click the PDC button.
 
A feature I've requested was to provide the Sonar user the ability to freeze the entire project with one click, so that you have a temporarily processed mix, and allow you to save your valuable CPU power and reduce latency by allowing your "armed" track(s) to use active plug-ins. This way, the rest of the mix plays like a single stereo track with no plug-ins. The only active plug-ins are on the track(s) you have armed to record. I don't know if that's even being considered, but I felt it was a good idea.
 

Alex, I went with the bundle I linked because it came with the 2i4...I needed the extra outputs and MIDI ports. The Boom mic holders will also come in handy. The 2 mics will serve their purpose.
 
Of course, I will grow my selection of microphones over time and need. :)