Hey man here’s a long response, but it may help. Basically, I would keep the spacer and not worry about replacing them with an inexpensive adjustable shock, because the cost to ride quality difference is negligible. I wouldn’t waste your money on the Bilsteins, you won’t notice a difference at all. Mine are set to 1.7” so they’re not even maxed out and still I noticed literally no difference in ride quality from stock to Bilsteins. You’d be better off getting the Rough Country 3” lifted struts because at least they come with a longer strut AND coil, so realistically you *should* get a better ride because you’re not just introducing lots of preload on the stock coils like you’d be doing with the Bilsteins. Since I only wanted to go up 1.7” and I figured eventually I’d get Fox coilovers, the Bilsteins fit the bill for me for price and the amount of lift; but if I were to do it again I probably would’ve looked more into the eibach adjustables or rough country. I believe I read somewhere that the eibach ones are valved a little bit more progressively vs the Bilsteins which are digressive. In general, digressive offers better handling at the expense of slightly rougher ride quality, whereas progressive typically offers a better ride quality and more damping but because they’re softer at slow speeds they can feel like they don’t handle as well as Bilsteins. In any of these inexpensive 2.0 adjustable shocks I doubt you’ll notice any big changes in ride quality between them though just because you can’t do nearly as much with a 2.0 shock than you can with a 2.5 or 3.0. The only reason I would say eibach > bilstein is because I believe eibach includes their own coil in place of the factory one so maybe that will lead to a better ride - but I don’t know the actual spring rates so that’s just a guess. And rough country probably just because it doesn’t seem to add preload to get the height, it’s actually a longer strut and coil.
My best advice if your factory shocks are still going strong, use them until they start to go out or until you’re comfortable spending the money on 2.5” Fox coilovers. The 2.5” debate is even stronger, but thru much research & reviews I’ve decided for myself that Fox > all other brands when it comes to direct swap coilovers for our Rams.