Power Center/Converter Recommendations

If you aren't going to be charging your batteries from a generator, the time it takes to get a reasonable charge is likely of only secondary importance at best. The WFCO may not be the very best available, and others better for at least some situations, but it may well be perfectly adequate for your needs and a good overall tradeoff in terms of size and convenience of installation. I don't see any real reason to avoid it particularly since you have already bought it if you aren't planning to go off the grid for long periods of time—and even if you are, a solar setup would likely be of at least as much value as replacing it with some other unit.