Their Matched pairs are made by Seekins Precision
and are pretty decent (made to precise tolerances from 7075-T6 aluminum billet). Their regular ones, are well, regular ones (made from weaker 6061-T6 aluminum and not matched)...
I doubt Seekins makes the tactical ones and would recommend spending a little more on a good matched pair if at all possible. You can get the EGW HD rings (which are made using the same process as the Vortex Matched pair (Seekins). I was able to pick the 0.850" HD's up from Optics Planet for $93 shipped. Otherwise I was going to buy the Vortex Matched Pair (Seekins).
EGW 30 MM Practical / Tactical Aluminum Scope Mount Rings FREE S&H 61100, 61101, 61102, 61000. Evolution Gun Works Riflescope Mounts, Rings & Bases.
(the 0.850" are $125 rings, but add them to your cart and you will see they are $91.99)
EGW HD Tactical Aluminum Rings .850" Ring Height: Evolution Gun Works Inc.
(you can read about how they make the HD rings)
I wish I could afford stainless steel or titanium rings and bases, but sounds like you and I are in the same boat. For our price range, it's 7075-T6 for us