I like the csw a lot very strong ffb nice wheel with plenty buttons also with belt drive its a lot quitter and can use less or 0 smoothing with rf2 especially.
Compared to the t500rs some people do think the t500rs is slight stronger ffb etc but I think they are both quite good wheels and really would come down to own personnel preference. With the t500rs you also get a pretty good set of pedals at around £339 is quite good deal. Also though the t500rs has static paddle shifters, so mostly driving formula style I would have had to also get the f1 style Ferrari addon or buy the integral version that comes with the Ferrari wheel for £400. Yes it does look slightly cheaper more plastic and the rotary's are just for show but still not bad altogether.
I also already had a set of clubsport pedals v1s and are probably slightly better than the standard t500rs.
Price for formula rim and base csw is around £500 and then also obviously a set of pedals if csw v2s another £200 starts to become a bit expensive.
Another option now is the thrustmaster tx xbox wheel its also compatible with the pc and slight less overall power in ffb strength than t500rs although I think most people with this and csw run with the ffb lowered anyway nobody really could use really strong ffb and do a long race for example. Some reviews say its quite difficult ot notice much difference between t500rs and the tx. The thrustmaster tx is around £225 and normal wheel has moving paddles so no need to upgrade to Ferrari addon right away you could add this later. One thing is the pedals that come with the tx version are terrible but thrustmaster have now a optional addon set of pedals that are close to the t500rs set also with a brake mod for around £80 odds or also the option of say cs pedals at £200 or csr elites at £120 ish both having a load cell for the brake.
The cheapest upgrade would be the tx wheel and tx upgrade pedals at £300 or say with the csr elites at £340 and would be I think a good choice compared to the standard t500rs mainly for the moving paddles with slight better brake with load cell and then in future could also add a Ferrari f1 wheel with no need to rush.
Obviously none of these apart from csw comes with leds and speedo but then so your original question about slipro leaves you with loads of options as to what you want to do lol as a slipro would look great on a Ferrari thrustmaster wheel
arrrg the full circle back to beginning of choices ! Sos for being no help at all
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Edit : Ye Bob I forgot about the sli-m its also slightly cheaper option, I remember seeing your wheel a while back started me off thinking to mod back in the day