Thanks, I should clarify Im not new to the game itself but new to 6th edition
lol, so I have some idea what to do when it comes to lists

. Ill be honest more and more I am leaning towards the "Sentinels of Terra" Supplement and the Imperial Fists, I made another list with the Sentinels in mind, what do you think is it better then the one above in regards to both competitive play and fluff? Also changed the title to help with tactical thoughts!
HQ:
-Chapter Master
*w/ Artificer Armor
-Librarian
*w/ Force Axe
TROOPS:
-x10
TAC Marines
*w/ x1 Grav Gun, Heavy Bolter
-x10
TAC Marines
*w/ x1 Grav Gun, Heavy Bolter
-x10
TAC Marines
*w/ x1 Grav Gun, Heavy Bolter
-x10
TAC Marines
*w/ x1 Grav Gun, Heavy Bolter
-x5
TAC Marines
*w/ Lascannon
HEAVY SUPPORT:
-x3 Centurion Devastators
*w/ x3 Grave Cannons or Lascannons, x3 Missile Launchers
-x3 Centurion Devastators
*w/ x3 Grave Cannons or Lascannons, x3 Missile Launchers
-Whirlwind
*w/ Stormbolter
-Whirlwind
*w/ Stormbolter
-Whirlwind
*w/ Stormbolter
-Whirlwind
*w/ Stormbolter
FORTIFICATIONS:
-Aegis Defence Line
*w/ Lascannon
-Bastion
*w/ Lascannon
TOTAL ARMY: 2000 POINTS