I like to have at least 20 scoring marines in 1,500, but more is always better. Let me help with the list you have put together.
My comments in red. HQ Chaplain with
PF and homer = 125
I'm not sold on this guy. He's expensive and doesn't do much. The Terminators really don't need a homer. Can't Drop Pods still take Locator Beacons? Emperor’s Champion = 140
Great in challenges. I would only take one of these HQ choices until you get to higher point games. Elite
Terminator Assault Squad w/ 3
TH/
SS = 215
I would avoid taking Lightning Claws if at all possible. TH/SS is just so much better in almost every situation. Terminator Tactical Squad = 200
These guys need a heavy weapon to make them worthwhile. Dreadnought , in drop pod = 135
I love Multi-Melta Dreads in Drop Pods. They are great in taking out key targets and causing some backfield disruption for your opponent. Troops
5 Initiates with bolters,
ML = 85
5 Initiates with bolters,
ML = 85
Good scoring units. Keep these the same. 5 Initiates with Lascannon = 90
2 squads is enough static troop choices. These guys would really benefit from a Rhino. 9 Initiates Melta, drop pod = 176
Podding troops are good. I would recommend taking pods in odd numbers so you have more come down on the first turn. Heavy Support
Land Raider Crusader = 250
Always, always, always give your Land Raider Crusader a Multi-Melta. The kit comes with one. It is a great value for 10 points and can split fire thanks to PotMS. There's another way to run Crusader Squads that harkens back to 4th edition tournament Space Marine armies (if you played then)... the 6-man Las/
Plas squad!
HQ The Emperor's Champion 140 (Or the Chaplain, if you really want him. He joins a Crusader Squad or the Terminators.)
Elites 7 Assault Terminators 315
-Thunder Hammer/Storm Shield
Land Raider Crusader 260
-Multi-Melta
Dreadnought 145 (he targets key enemy tanks or devastator squads)
-Multi-Melta, Heavy Flamer, Drop Pod
Troops 6 Initiates 134
-Plasmagun, Lascannon, Sword Brother with Meltabombs
6 Initiates 134
-Plasmagun, Lascannon, Sword Brother with Meltabombs
6 Initiates 134
-Plasmagun, Lascannon, Sword Brother with Meltabombs
6 Initiates 119
-Plasmagun, Lascannon
6 Initiates 119
-Plasmagun, Lascannon
Total: 1,500 This list is a much different approach, obviously. Getting your hands on all of those Plasmaguns, Lascannons, and Thunder Hammers isn't as difficult as you think... Look up "Magic Mold" or "Instant Mold" on amazon.com

(your local non-
GW LGS may even carry it) EDIT: Link
here. This list gives you a hard as nails
CC unit that can walk through whole armies if not properly dealt with. In addition you have a Dreadnought who drops down turn 1 and causes havok, destroying support units (like basilisks or devastators). Finally you have 30 scoring marines armed to the teeth with low-
AP weaponry. Enemy transports will not last long and most players will pour firepower into your Terminators over the Initiates.
Again... proxy before you buy anything. This list certainly isn't for everybody.