Good day to you all ! Im in need of some advice on speaker choice in a somewhat challenging acoustical environment... I have Built-ins on each side of a floor to ceiling rock wall fireplace... Bookshelf speakers are my only option.. I currently have a mix of equipment from my other systems but would like to get the same brand speakers all around if possible.. currently my fronts are B&W 602 S3 , front wides are Klipsch Rb25's, surrounds are the SVS Ultra surrounds , Center is an Klipsch 6504-Pro-THX in-wall speaker built into the front of my fireplace mantel. subs are dual SVS SB13 Ultras, SVS offers the Ultra Bookshelf however its rear port fireing back into the cabinet could effect the sound ? Right? In The past Ive had predominantly owned Klipsch but the Books now also have rear ports.. any opinions /advice? Thanks