Yeh I suppose CRT would be the better option.
Then again if I purchase a second hand CRT amiga monitor there is no saying how long it will last. Taking into consideration of the age of the monitor.
Don't worry about the quality of playing games on the BenQ LED monitor (yes, it's a LED - NOT LCD!). The horizontal and vertical scrolling in games is just as smooth as on a CRT monitor. The only thing is that you can't fill the whole screen (except for overscanning the Workbench screen with the "Overscan prefs"). But because it's a 17" inch screen, the games are displayed as 15''. Just like you're old Amiga CRT monitor.
If you buy the 19'' BenQ, the display is even bigger!