When it comes to space marines there are so many bits to use in this hobby it would be quicker to list the stuff that isn’t suitable. I’m going to list sets from the regular vanilla set for the purpose of this article that I think are the best value in terms of bits.
Space Marine Devastators
For the heavy weapons alone this set is great. Personally I have never seen anyone build all the models from this squad to make their devastator squad as everyone likes to use the same heavy weapon or two at the most. This set is great to pick up just for the heavy weapons as you can use them in tactical squads also. Aside from the obvious heavy weapons you also get a pair of the ever popular kneeling legs as well as cyber skulls and other little accessories that you can use throughout your army. It also contains one of the view space marine bare heads that isn’t bald!
Space Marine Commander
GW had a brief run of releasing plastic HQ models with several options. In fact it was so brief, we only have this guy and the CSM Terminator Lord in 40K that were done this way. This has always been one of my favourite boxes, not just because I can quickly cut the pieces off the sprue but also because there are a lot of great bits in this set. The obvious ones are the combi weapons. For years the combi-melta was one of the most popular bits I sold on the website. 6th Edition has made it slightly less popular. There are many great parts and weapons in this set to use to make your space marines look unique. The cloaked body back is a very nice part for character models. I’m also a big fan of the bionic arm with a chainsword and the backpack with the eagle heads.
Space Marine Command Squad
This one is great for several reasons. Of course you get the bits to make an apothecary which are very popular as are the company champion parts. I love the helmet for that model due to it’s knightly feel which would fit well in any Black Templar army. If you’ve not purchased this set before you may not be aware that it also contains a meltagun, plasmagun and flamer which is really cool as well as the same sprue from the Devastators squad that contains the kneeling legs. I really like the large banner from this set as well as the pointing arm, which fantasy players will know is included in a lot of sets. Everyone points during a battle in these universes!