Currently have a pair of wharfedale 7.1's on wall brackets in the kitchen, they are linked up to my system in the next room. However, am finding them unsatisfying to listen to (have a pair of rega elas, mk1 next door) and am looking for a reccomendation for a decent 2nd hand pair of bookshelf speakers. Am currently using a rotel ra-04 amp. Any advice muchos appreciated...