i have dealt with drivetech coolers for a few years now and never had a problem with any off them, have fitted one of their oil coolers and power steering coolers to my car, every cooler i fitted to vehicles when working for my ex boss was drivetech, very well made unit, kits come with brackets,hoses,clamps etc. personally i wouldnt use second hand shit because you dont know if they are blocked/broken/bent. with the size of cooler required it all depends on how much space you have, as for style well thats up to you.