Hey adasko99,
I do enjoy 2-7 so much. It is fun and I'm a bit of a fish so take my comments with a grain of salt.
As a limit game, I generally use what I use for Stud games which is 40 Big Bets.
Certainly they would be my best starters in TD. 7432x I feel is stronger in NL SD. It can continuall force you into awkward decisions if you hit a 9 or T on the 1st draw. Do you stand pat and just barrel the pot to try and force your opponents to fold? If you do and your opponents stays, what do you do after the 2nd draw if you opponent stands pat and plays back at you?
In TD 7432x can only draw a 5 or a 6 to be truly strong. Rough 8s and 9s will often get you into trouble particularly in multi-way pots. In SD however, not only hitting a 5 or 6 makes a strong hand. Hitting 8 or 9 is OK. Depending on how many cards your opponents are drawing, even T or J can be solid.
Regards
Laz