I used turf gem 2, which is sold thru turf merchants. I have a local seed company that sells their brand of seed (its awesome stuff)
I get a bag of 50lbs for 85 dollars.
Its a mix (that constantly changes)
My mix was traverse srp, starfire II, and aztec II
One of these ( i forget i thought was a dwarf version) it could handle "lower HOC" around 2" if i remember right
Now turf merchants also sells bonsia TTTF which is a really slow growing, fine blade, deep root version. I heard that this version can be mowed short 2.5" or less on a regular basis and look like a KBG lawn. It has extrememly fine blades and deep roots.
I consider 2"ish short for TTTF. I emailed turf merchants about HOC with turf gem II, they said for my area, 3"-3.5" is fine. Thats a big jump from transition zone TTTF that should be cut at 4"+!!!
here is my local seed company website with a link to the seed. He has the best prices around by far and he is local to me!
http://www.debruynseed.com/
click on grass seed tab. You can look at straight seed or mixes/blends
I did turf gem II, with vip 3 PRG
My fall reno i plan on doing the waterworks KBG and vip 3 mix. Its 60% VIP 3 and 40% KBG
His seed is climate controlled too. I know because i put the HVAC system in for him.
Side note, with seed of any kind.....the temp and the humidity level cant exceed 100. So if you have a temp of 50 degrees, your humidity cant be any higher than 50%
If the temp is 60, humidity cant be higher than 40% etc
His seed room is controlled and my germination rate with his seed i swear is near 95%. Its sick how thick it comes in!