Station Master is a really good antenna, and would serve you well, but they really don't like lightning much.
The comment on the 4 bay dipole array is a good one, and what I was also thinking. Finding a 220 4 bay is gonna be impossible on the used market unless there happened to be a lot of 220 commercial in your area. In my area there was none. In fact, in over 10 years of being a commercial radio tech, I have only seen one 220 commercial system and it was sitting unhooked in the shop I work for now when I got there It ended up in a dumpster.
There is a ton of VHF however. And Andrew / Commscope and Decibel both made 220 4 bay antenna's.
I would try locating some specific design information on them, and then locate a 4 bay high cut VHF 224 and then modify it to operate on 220.
All that being said, I know you said you want to get the best performance possible out of the system. But you if you haven't really considered what that is, it's time to do so.
While I am writing this I have little idea where you are. So I will say that you need to consider what coverage you want. Do you want it to talk to the horizon at the cost of not working well in the town that you live? I am guessing not. So what is the overall height of the tower. Meaning the HAAT or height above average terrain? Is it on a big hill right outside of town? Are there towns on both sides of the hill it's on? Lots of questions I know. But there are ways of creating downtilt in an antenna electrically that will drive the signal down the side of the hill and into the town, creating great coverage in the town, but at the expense of the coverage into the next town down the road.
The reason I bring this up is I fight this with my tower.
Grab a map, and find Johnstown Ohio. Just east of there is my 240 foot tower. Sitting on the highest point in the county. Once you find it, find YOungstown Ohio. It's Northeast, on the PA / OH border. I talk into the repeaters there, from antenna's on the ROOF of the building. That's 220 feet below the top of the tower. so you can see what I am getting at. I put a db420 on the top of the tower and talk OVER Johnstown. I actually have a better signal in Columbus 30 miles away than I do 4 miles away in Johnstown. The reason is how an omni directional antenna has gain. The gain of an omni is created by flattening and concentrating the signal in a radial beam pattern.
So. review the pattern on the antenna that you select or design. ANd make sure it's a good fit for what you are trying to accomplish.