Congrats on your new machine. I have done the hit the wrong button thing too!
I use Isacord thread on my machine and managed to get some great deals on ebay for partially used spools that had been rewound on smaller ones. It worked out to be about 15% of the cost per meter than I would have spent on the big spools and the thread stitches out very nicely. I have such a wonderful selection now. Then, as I am able, I will buy the regular sized spools. Just got a great selection of Robison thread the same way. Haven't used it yet, but the lady I got it from owns an embroidery business, so I anticipate it will work well. I also think that Brother puts out their own thread, but don't know anything about it.
Good luck, and enjoy!