hules98

i have a harmon kardon avr 240 receiver im lookin for new speakers i have a yamaha sub which is fine and my surround speakers im not sure the brand i just moved they are in wall from previous homeowner can i buy any front and center speakers or do i need new sub and surrounds to mate up with the others i want to buy i was looking at klipsch rb-61 fronts and klipsch rc-52 center