Season 10 of the 1987 TMNT cartoon will be released on DVD on August 14th. Two episodes were left off the fifth season release, and they will be included on this set as bonus episodes. That means that all 193 episodes will be available on DVD.
So on the one hand, there’s Lionsgate. Lionsgate will have released the entire 1987 series later this year, which has almost 30 episodes more than the 2003 series. The only season that got broken up into pieces was Season 3, which had 47 episodes. The only real issue with their DVDs was leaving off two episodes in Season 5, which is being fixed with the Season 10 release.
On the one hand, we have FUNimation. Their releases were almost entirely piecemeal, with many DVDs having about five episodes. Season 3 and 4 had episodes that were horribly out-of-order. Season 2 is nearly impossible to find, with Part 2 going for $400, if you can find it all. And they never completed the Region 1 release, so Season 7 may never see the light of day.
In short: Lionsgate > FUNimation.