As a fellow northerner I'm also sometimes a bit reluctant to part with the readies. My concern with your approach is that you're proposing to replace what you have with new gear, without looking at what's wrong with what you have already. Perhaps stretching a point, but a bit like taking your car to the garage and asking them to replace everything to fix a problem - it might work... it might not, but it'll cost you to find out.

My suggestion - for OP to ignore or accept (equally at his peril) - use this thread to solicit advice on new kit, as titled, which I'll back out of, and a separate thread to investigate the specific problems that you're having. I was following your earlier thread and was wondering power-supplies, grounding strategies etc. But, these are two separate topics and deserve their own threads.

Of course, you're totally entitled to replace all your control system...