Welcome to the site, glad to have another Blood Angels brother on board.
You've got a good base for your amy, I'd recommend transports and toys next
Assault marines are fine to either drop in or run around with their pack but your tactical marines are going to need some kind of vehicle to give them a bit of mobility.
Traditionally this is either a rhino or a razorback, both are good choices depending on your desire to combat squad or not.
Luckily you dont have to decide before you buy as the razorback kit comes with all the parts to make it either a rhino or a razorback and costs the same price
How is this you ask? I've no idea.
Basicly the difference between the two is the top hatch which is either a flat hatch of a hatch with a turrent, just be sure not to glue either in place and you can then swap between them between battles depending on what you want to take.
Dreadnought are really cool models and are very flavourful for the BA, if you pick one up it might also be worth picking up a drop pod to get it to battle quickly and this pod could also be used for one of your tac squad if you don't take the dread in a game.
Other good toys that you can't go wrong with would be assault terminators, predators of either type or a beastly special character like mephiston or the sanguinor.
One thing I noticed in your list of models was a lack of Sanguinary priests, these are what make the BA's better in combat and more survivable than other marines and you will really want at least one.
Good luck, any questions just ask
