I went through this earlier in the year. To state the obvious, it’s all about what compromises you are prepared to make.
DSC seems like a very useful feature but it doubles the price of the unit. Knobs are preferable to buttons but they add to the size and the cost. Larger units typically have more battery power but they are bulkier and heavier. Etc., etc.
Anyway I ended up buying a Standard Horizon HX300 ($100 and change on amazon.com). It is compact enough to fit in the front pocket of my Kokatat PFD, it’s submersible, floats, and flashes a strobe light if it is dropped in the water, It gets about 13 hours on a charge and recharges quickly via a USB cable. It comes with a charger, but any USB charger will work with it. It has dual watch, tri-watch, weather alert, etc. and is switchable to Canadian or International channels. It doesn’t have knobs for volume or squelch but the buttons are large and really very easy to use.
So far I’m happy with my purchase.