I have a 21 aventon aventure. I have been out of the saddle for some time due to a injury long recovery death in family. Getting ready to ride again. Can anyone make a recommendation on a more comfortable seat or will a suspension seat post take care of the problem. I'm 71 yrs old , 6 ft 1, 245 lbs, somewhere around 20 miles the seat gets very uncomfortable. I am riding 98% pavement.