I am currently building an ITA Miata and am in search of a good seat. I would prefer one with side mount rails because the car may be hot seated at HPDE events. I want something SAFE and comfortable. Also, I need a slightly wider seat, seeing how I am not the skinniest Miata driver out there. I have a 38" waist and am 5' 10" tall. Any suggestions as to good seats that fit well in a Miata? Please know that I'm not rich so something affordable over any high dollar butt cushions is greatly appreciated.