I’d just get the C350, it’s an epic centre in my opinion and also is a three way design with the tweeter higher than most centres, with an extra mid-range cone.
@Tu12tle - I agree with this. Fwiw, I originally had my C350 paired with some 6th Gen Silver 100's (Also epic speakers imo). So much so, that when I got an irresistible offer on a new set of 6g 300's, I moved the 100's to the bedroom!
Having the matching 3 way driver set up across the LCR was a huge upgrade in sound imo. In truth the bass on the 100's is better vs the 300's*
But - I'm running dual subs in my setup - so bass is not an issue. (Maybe use the difference in price vs the Arendals to add a 2nd sub?)
The deciding factor for me was matching centre 3 way driver on the L&R speakers. That extra dedicated midrange driver really helps with vocal (clarity etc). Especially when audio pans left to right.... I feel my front stage audio has opened up as a result of the LCR pairing. On current price I think it's a phenomenal front stage, that's hard to beat imo.
*MA have done some serious witchcraft with the bass response of the 100's. Never heard such fast, tight bass from bookshelf speakers.