The LTR-52246S behaves well with ProDisc media, so there are no worries in my mind with that burner. I have used ProDisc media in my LG drives, and never had a problem either.
In comparing ProDisc to Ritek, the only difference I noticed was the width of the discs. ProDisc seems to make their discs a tiny bit thinner than Ritek or other manufacturers; you may not even notice, because it is somewhat insignificant. It hasn't had any effect on the discs, from what I can tell, just a cosmetic difference.
If you opt for the TDK discs, you may receive Ritek media, and you may not. Since TDK uses various manufacturers, you are never sure what you are going to get. I still trust TDK though. I have used TDK discs made by Ritek and CMC, and both worked fine.
I know it's a tough choice. Personally, knowing my frugality, I would go for the cheaper media.
Especially considering that I have had success with ProDisc before. The choice is yours, however.
No, I like women.