If, as you say, you have never eaten anything that hasn't come from a supermarket, then I would (respectfully) advise you to take one of two courses.
1. Bourbon Reds ARE wonderful turkeys and do not taste aweful if raised, fed, processed and cooked properly. They are a heritage breed so don't expect the dressed bird to look or taste like a butt-erball. They don't have the double (mutantly extra wide) breast of the Broad Breasted White that Butterball uses and they grow at a slower (read 'more normal') rate as well allowing them to develop a richer flavor. Cooking methods should be adjusted to prevent the slightly smaller breast from getting overdone and dry. We like to cook our turkeys broken down to main parts so that we can simply remove the breast when it is done and continue cooking the dark meat as long as necessary. The snag here though would be whether a Bourbon Red would be mature enough by Thanksgiving if you are just getting the poults now? Many feel that heritage birds need 8 or 9 months to get enough fat on them, but I'll let others chime in on that point.
2. You could get Broad Breasted white or bronze birds in late May or early June. Home raised will taste ever so much better than store bought! These will have the familiar large breast lobes that you are familiar with from supermarket birds. Of the two, the Bronze are slightly smaller but they both have the genetic potential to grow to grow to unnatural, unbelievable, unhealthy size by 7 or 8 months old. I bought what was supposed to be 7 White Holland poults (another heritage breed) last summer. Too late I realized that the 2 that were supposed to be 'older' turned out to be Broad Breasted Whites! (The rest are Midget Whites which I love!) I just dispatched the tom who could barely walk and to my surprise when I hung him from a scale he weighed 61 pounds at 10 months!!! He was so huge he would never have fit into an oven so we just boned out the breast and thighs and ground them into turkey burger. The hen prolapsed 2 days later and we processed her into breast cutlets and hind quarters. She was over 40 pounds. Point is, don't let a broad breasted bird go too long! 4 or 5 months is good.
Finally, please remember when you process your bird, to observe all the standard hygiene rules, quickly and thoroughly chill the carcass in an icey brine for several hours and let it rest or "age" in the fridge for 4 days before cooking it! The quality and tenderness are so much improved when you do!
Whatever you choose, I think you will be better off raising your own rather than buying commercially raised. You control the feed and living conditions yourself when you raise your own and believe me you WILL taste the difference!!!
~S~