Need input

I'm afraid of what that experience might do to my record collection.

That's a great vintage find! Looking forward to your impressions.

OK guys. I went and picked up that RT-707 today. Wish I could post photos. Pristine, not a scratch. He had an old live master of Joni Mitchell on it. When we spoke awhile and he found out that we were both from Calif., he from LA me from SF and that my grandpa and his dad were in the Navy in WWII in the Philippines....he lowered the price from 300.00 to 200.00! I thanked him for sure. I'm definitely going to church this coming Sunday!
He even threw in a vintage BASF take-up reel.

Thanks for the input guys. I'm going to start reading and watching how to take advantage of this unit.

WOW, he gave you a great deal on the deck. You will enjoy it. Reel to Reels are complex machines but easy to operate and record with. You asked above about how it might effect your vinyl record experience, it will only add to your enjoyment. Record a few of your favorite albums to tape and listen to how magnetic tape can make the music sound a little richer or warmer. Not saying it will make it better or worse but just sound different, it is something fun to experiment with. Your RT-707 will open up another door to listening to high quality recorded music. As always, Analog Rules !