You will find that for higher power motors discrete component designs always work out cheaper. Be careful of the "integrated solution" maximum current ratings - motor startup, peak, and stall currents can be much higher.
Hi Home on ICE
Check out the DRV8312-69M-Kit.
The DRV8332 Driver / Protection IC will support sub50V up to 8A, where the DRV8312 is 3.5A
For more on TI's InstaSPIN technology, check out this link.