We've been spoiled by more refined Rifles...that said I know there's a few issues with the Canadian 180's, but if I was going to buy a second MSR, I'd certainly consider one of them.
I have an RDB, which has been great, BUT, you can't just buy parts like you can for other common Rifles like the X95. I actually considered getting another gently used RDB, you can get two for the price of an X-95, one to beat up, one to keep for the collapse of civilization.
I'm really liking the Bullpup, I stood at the counter with an X95, and an RDB, both in excellent condition, in the end I left with an X95, I'm only keeping one MSR, I'll take the one that I can buy all the major parts today, vs., maybe, maybe not.
If you are just looking for an MSR to punch paper, an RDB is a good buy, just be aware of the problems, as there's a few relatively minor ones. There's a few threads here that cover all the known issues, from firing pins to who brought it into the Country.
The X95 is clearly the superior Rifle...and clearly, I have to sell a few firearms in the future to offset the cost.