You may find this radio has some limiting factors. I would be surprised if it had an audio chip with enough headroom to really benefit from an amplified mic, without distortion first. With the stock AMC values, your end result may just be more sensitivity with increased background noise. If climbing up on the stock mic and talking loudly into it, does not noticeably increase the modulation level, an amplified mic is not likely to help a lot.
The receiver having no noise blanker could significantly reduce your ability to hear other weak stations too. Be careful when selecting a radio advertised as having a noise blanker. Some tell outright lies in their marketing. Like STRYKER on their SR-94HPC. Purchased specifically for the need of a noise blanker that was nothing more than a mislabeled ANL. Making the radio totally useless in two of the vehicles I've tried it in. Nearly deaf, due ZERO ability to handle impulse noise.
I'm not saying don't try the radio and see if it meets your needs. Just that if it doesn't, changing the radio may help more than you expect. The antenna you selected on the other hand, is an awesome performer. We have several locals who switched to them a few years back. One even added a parasitic reflector element behind it to form a mobile directional beam. The only thing some didn't like was the attention grabbing blue light. One local found that feature is easily removed by applying a few seconds of a 1,500 watt carrier and offers blue light removal service, for free.