"Might lose sound but I'm 68 and there's big difference in weight."
What are you doing with your system, putting it away after each use? Just leave it on the rack and let it support the weight.
If it were my system to upgrade, I would keep the Quicksilvers and get a preamp and a dac, or just get a dac with a volume control. If you go that route, you will gain sound quality, not lose. (Providing you do a good job matching whatever new components you end up buying. You shouldn't have any problems. There's a lot of great products at all prices to choose from.)
What are you doing with your system, putting it away after each use? Just leave it on the rack and let it support the weight.
If it were my system to upgrade, I would keep the Quicksilvers and get a preamp and a dac, or just get a dac with a volume control. If you go that route, you will gain sound quality, not lose. (Providing you do a good job matching whatever new components you end up buying. You shouldn't have any problems. There's a lot of great products at all prices to choose from.)