I use a Vitrifrigo 4.2 cu ft refrigerator without a freezer for the same reason you stated. I do carry an Engel portable 30 liter freezer but after looking at the Vitrifrigo 1.6 cu ft (45 liters) drawer freezer you are thinking of using I'm liking it very much.
As usual, we have here all sorts of choices and combinations. Three factors dominate: cost, space, electrical draw. We have a 45-quart Engel, two 4.2 cf Vitrifrigo fridge-only fridges in a cabinet, a seven cubic-foot freezer on the flybridge deck, and a large-capacity commercial ice-maker (clear ice) on the aft deck. We use the Engel to supplement the Vitrifrigos and to keep beer more than ice-cold. While the Vitrifrigos keep food suffiently cold, they do not get the temp down to near 32 degrees as does the Engel. We like our beer VERY cold. The chest freezer, even in 90-degree temps, easily freezes ice cream rock hard allthough I did add some inulation. We use a lot of ice and never run out.
As for electrical, our cruising patterns are such that we do not ever worry about capacity. Our battery bank sustains us for 16 hours to 50% depth of discharge, no solar. It takes a 5-6 hour run to fully recharge our batteries. We also do not care when we must run a generator a few hours per day if we anchor for more than one night which is not often when cruising. Solar would be a choice if our overnight pattern were to change but it is not worth the bother for our use pattern. We do have plenty of unused real estate to add solar panels.
We also have two generators, a 12.5kw and a 7.7kw. We use each according to the load drawn. The 12.5kw is nice to have as it produces about the same as the input from 50-amp shorepower. Total number of hours on the two are about 6,000. The propulsion engines have about 6,700 hours. No doubt the prior owners used them way more extensively than we do. I attribute this to the substantial upgrades we made to the electrical system.
We are full-time live aboards, six years now, and, cooking-wise, we enjoy having most everything at hand that we could have in a dirt house. What works for us won't work for others. As for the Engel, we love having it but it now costs $1,200. We paid $800 for the same model four years ago. That is a dear price to pay for cold beer.
Last note - we run the Engel on 120VAC even though I could easily run a dedicated 12VDC circuit. I may get around to doing so this winter. By the way, our Vitrifrigos are 12VDC only. Except for lack of ready access to a dedicated 12VDC circuit, I could never see any sense to suffering the conversion losses from charging batteries, then inverting to run the fridges on 120VAC, only to have the fridges convert (more energy loss) the juice back to 12VDC to run the compressor.
