Capital Sea-
Great advice, so far!
Does your anchor locker already have a factory installed drain, and, if it does, have you tested it to see if it drains properly and doesn't drain down between the locker wall and the outer hull and into the area under the v-berth? (This was a problem on some boats.)
If you opt for the longer rode of 300 feet with the required chain, you may want to add a little height to the rear wall of the anchor locker. Some folks with longer rodes have done this. I'd wait and see how it fits, first, though. If I added a section, I'd add it so that it would fold down backwards for access to the windlass and rode to untangle any snarls. Be sure there's airspace for the rode to breathe and dry at the top, or even make it out of netting.
The older Lewmar vertical windlasses, including the Sprint 600 and the V-700, had the electric motor mounted vertically and directly below the above deck chain-rope drive unit, and drove the unit above through spur gears.
The new V1, has the motor mounted horizontally at the bottom of a drive shaft coming down from the above deck unit, and drives that shaft with a worm gear, like most other brands of vertical windlasses.
The impact of the above change is that the motor sets lower in the anchor locker and may impact the space available for the rode, which may determine how much rode you can carry. It probably depends on how low the drive shaft unit places the motor.
I do remember TyBoo Mike saying there was room for 300 ft of 1/2" rope and some chain in his former CD-22, but he had a Horizon 600 windlass, which was entirely above deck. (See below)
I wonder if anyone here has tried the V1 with 300 feet on a 22 already?
Here's the difference in motor mounting types, but not necessarily in photos of the V 700 and the V1 (which I couldn't find a below deck photo of).

Quick Aires 500 vertical windlass installation in my CD-22, Sea Wolf, with 200 ft of 1/2" rope (no space problem here).
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(Shows how horizontal windlass saves rode space in locker.)

300 feet of 1/2" rope in Tyboo's CD-22 locker: Ouote: "This is the rode locker in my 1987 C-Dory 22\' Cruiser, with 300\' of 1/2\' rope and 15\' of 1/4\" chain as placed by the windlass. It fills the existing locker up, but there has never been a problem with tangling or spilling into the v-berth."
LINK
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From all of the above, I'm pretty sure the V1 motor placement won't interfere with the use of 300 feet of rode on your CD-22, but thought I'd do some looking into the question for you, since this can be a problem in some installations.
Hope all the photos and drawings help you understand the issues!
Good Luck!
Joe. :teeth :thup