If you are looking for a budget USB audio interface (i.e. the 2 input stuff < $200), the best recommendations for Sonar that I have seen on these forums, based on driver compatibility and latency are the Tascam US-2x2 ($119 US) or the Focusrite Scarlett 2i2 2nd Gen ($149 US).
I have a legacy M-Audio interface that they quit making drivers for in 2009. They only support their current products. I'm just lucky that their Windows 7 drivers still work in Windows 10. If I need a quick USB replacement I will probably choose one of the above.
For a larger studio setup with lots of inputs and a bigger budget, you have some great choices (MOTU, RME, etc). But for the budget end, good ASIO drivers and pre-amps seem to be the limiting factor. So that tends to narrow the list down fast.