It really depends on what you want. Do you want something with a lot of sounds or do you want a really good sounding digital piano? If you want a lot of sounds and don't care about weighted keys you could get a workstation, like the Korg Triton or whatever. If you want weighted keys and a better dedicated piano sound then go for something like the Roland, but it's worth noting that most of the non piano sounds on stage pianos are usually pretty lacking.
I'm not sure what price you can get on the Roland, but looking online it looks like it retails for about $1600 USD. Personally, if I was looking to spend that kind of money, I'd probably think about spending a little more and getting something from Nord. The Electro 73 key piano/organ is pretty well regarded. I believe it has weighted keys and most of the stock sounds I've ever heard from Nords are fantastic. I've heard head to head comparisons with the original instruments they're sampling and they're almost indistinguishable on a recording. I believe that model offers several pianos, several organs, a range of electric pianos (Rhodes, Wurlitzer, etc.), some weirder instruments like mellotrons, and some string and horn patches.
There's also a lot of adjustability on Nord keyboards, so instead of having a standard organ patch with a couple of parameters (vibrato, reverb, etc.) they've actually sampled every drawbar setting from several different organs so you can drastically shape the sound just as you would on the real instrument. They are also pretty insane at holding their value, should you ever want to sell in the future. Also, you should go try some keyboards out at a music store, since feel and sound is a very personal thing.
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