Not only should you replace the shut off valves, you should snake out the waste pipes. In 25 years, a lot of crud can build up, now is the time to clean those drains, when the sinks are not connected, otherwise, you'll be like me, having to take the drains apart to run the snake down after the sink "clogged" a couple of months after the new kitchen was put back together.

I'm not sure that you can find a hose end connection of that type that is much shorter. If you don't want to try the other suggestions above, you would do better to find a hose that was less rigid. Refrigerator supply lines generally use small diameter hose, typically 1/4". Mine is 1/4" flexible copper that coils behind the refrigerator and doesn't cause the interference that your large diameter, semi-rigid hose does. They also make plastic hose for refrigerators in smaller diameters than what you have there. A hose as large as yours in this application is not that common.

How about a follow up -- a way late follow up ... So the filter is supposed to be a whole home filter, because the city has super old pipes with a lot of sediment. However, the filter needs to be changes monthly, and my sister had no idea. She (unknowingly) let it go for years. It was so backed up that her house barely had water pressure. It should have been an easy fix when I went to help her, but the 100+ year old house had a faulty main shut off valve -- as well as the pre-filter valve being faulty. So she had to call a plumber to contact the city to shut off the water at the street/sidewalk. There was nothing I could have done from there, the city won't turn it off for a homeowner (unless they don't pay the bill, lol). She now gets 'subscribe and save' monthly filter deliveries from Amazon to remind her to change the filter. Luckily, the plumber was able to blow the back up sediment out of her pipes, and she didn't need any pipe replacement. Her water pressure is now back to the usual crummy-100-year-old-house water pressure, instead of the even worse pee dribble pressure that she had with the backed up filter and pipes. Thanks!

I live in a condo which has 122 units and ONE shut off valve for the building's water supply. In other words, if water to a unit has to be shut off for any reason, the whole building has water shut off. In my experience, you can't replace a shut off valve without turning off the water for the building. You use the shut off valve so that you don't have to turn off water for the whole building to change a faucet or even a toilet. I would double check with management or whoever is in charge of maintenance because based on personal experience, you would need to close down all the water to replace the shut off valves. Because of the horrible consequences if a shut off valve breaks, my building has an annual inspection of all the shut off valves in each unit. If your shut off valve is found to be leaking or in danger of seizing (e.g. not shutting or opening properly), our building will make note of it. The HOA then turns off the water for one day so all homeowners on the list can get them replaced and the HOA generally provides the ability to use a plumber who bids a discount price. But the chief incentive is that normally it costs $2000 to shut off the water but there is no cost if you have the valves replaces on that day.