I bought one of those mark 5 on sale but was after more magnification and illumination. Just couldn’t pass up that deal. I’m thinking of selling and buying either the mark 5 5x25 or the cronus btr. I Haven’t ever looked through Athlon but see good reviews. Only mark 5 I’ve ever looked through is the one I bought but that is unmounted. Any ideas on btr vs mark 5 would be appreciated.