Since most companies consider PCs to be - essentially - a comodity these days I don't think the brand is as important as it used to be. That said if you pitched them to management they'll probably be more confident of signing off they were hearing "IBM" or "HP" or "Dell". But if you can say that Acer is significantly cheaper then they may just go for it. I recall a time (long ago) when "Dell" was the minority, upstart left-field choice - which proves it can be done.
I'd be perfectly happy to be issued with an Acer at work. I've had one for years at home, and i'm happy enough with them.