MX1 vs SPARROW

trying to decide between a sparrow A version and a Audinst-hud mx1. I use modded grado sr80i's and fostex t50rp and portapros. the sparrow is 45 more I think I'm leaning towards it.

I must use usb output from my laptop for now. but I plan on building a gaming rig eventually and then I'll have access to other outputs

thanks in advance for any opinions.

picked the sparrow because i think the power supply and build quality was a bit better.