I almost never actually post here since most people say what needs to be said or there is to be said already, but I think I may be able to point you to some other stuff. It's not all blowaway great and some of it might not even be great outside the confines of TNA, but here's some more stuff from the, I guess, glory days of TNA in 2005-6 before Russo took over that you should look into:
-AMW vs. Bobby Roode/Eric Young, Final Resolution 2005
-AMW vs. The Naturals, Bound For Glory 2005 (there's lots of fun TV matches between these two from 2005-6 after the AMW heel turn too)
-Samoa Joe vs. Christopher Daniels, Final Resolution 2006 and the TV match in April 2006
-Around late 2005-early 2006, there's a lot of fun sub 10 minute sprints involving guys like Shelley, Strong, Aries, Sabin, etc. on Impacts. Standout ones are the one in January or February 2006 where TNA briefly did a Generation Next reunion vs. AJ/Daniels/I think Sabin, and the eight man elimination match a PPV in late 2005
-AMW vs. AJ/Daniels, which I think is arguably the best tag series in TNA history. Good matches on TV at points in 2006, and then at Slammiversary and the PPV before that in longer matches
-The AJ/Daniels vs. LAX stuff gets hyped a lot and rightfully so too. Combined with the angles, it's probably the best TNA feud ever
Then after the Russo takeover, it gets unwatchable, but the Harris/Storm LMS match in mid 2007 is probably TNA's GOAT match.