Mil-Air is certainly do-able on the 345, but keep the limitations in mind about mil-air in general on these desktops. Because mil-air is so fast, unless you know beforehand the freqs you need, keep your search limits small, and your bank-scanning small as well.
If you try to scan more than about 10 channels at a time, you'll probably miss a lot.
If you try to scan more than about 10 channels at a time, you'll probably miss a lot.