I will not recommend specific speakers when you go out to audition. Rather, listen to different types of speakers, find your preference in type and then properly match a specific model to the power output of your Marantz receiver.
For example, there are electrostats, Ribbon tweeters, Soft Dome tweeters, Metal Tweeters and compression horn tweeters. There are 4 Ohm speakers that require more power than 8 ohm speakers. After the ohms, speakers vary in sensitivity or efficiency. Each type sounds very different from one another. Its up to you to decide what type of sound you like best. Then we can suggest specific models to assist you. Hope this helps.