Welcome to our forum.
Also am looking at the pearl finish on both and have concerns about that but it is the one we like the bestest!!! kay
These are answers to Tim's questions1) Filtration - HS 100% Marquis ??%, does it matter The HS filter system requires 5 cartridges. Others use just one or two. Marquis uses one. The HS system would require less frequent cleaning all else being equal, and it would ensure that the water is always as clean as possible. On the other hand, 5 filter cartridges are quite expensive when they need replacement. Both systems would provide equally clean water if you follow the manufacturers' instructions.
1a) Continuous (HS) vs. perodic (Marquis)
2) Differing Insulation, is one better?Insulation type is somewhat controversial. The HS system of full foam is probably superior in terms of insulating properties, but has the disadvantage of being more difficult to work on if a leak develops somewhere inside.
3) Energy Usage Guarantee. Is the Marquis going to cost more? (live in Michigan, gets cold in winter). Ask both dealers for an estimate for your area.
4) Frog vs. Baqua (HS suggests the Baqua)I like the Frog for convenience and it is proving to be reliable and accurate. Baqua makes the water feel silky and some people really like that feature of it. Some people have reported Baqua to be more trouble than it is worth. Baqua is relatively expensive.
5) HS includes 220v Subpannel, does Marquis?I don't think so, but this is not a big dollar item and any electrician can supply one as a normal and nominal part of hookup.
6) Is the HS Heater (no-touch titanium) better than Marquis?? Titanium is much more corrosion resistant than stainless steel. This is an advantage especially if the owner neglects water chemistry and lets the PH go out of spec. For people who pay attention to water chemistry, the titanium advantage is much less important.