Yep def stay away from UGF unless you love them, a good grade of quality sand will go a long way and will act as a buffer for your fish, crushed coral or Aragonite will aid you in the sand dept.
Go 90gal and if you can go 110gal do it once your done a few months will pass and you will be like crap i knew i should have gotten that 120gal hehehe that's how the bug starts and is why i have several setups with over a hundred fish LOL..