Heavy bolters for devestators?

So question guys would this make a decent counts as heavy bolter for SM devestators?

http://bitsofwar.com/2165-large_bosk...-mini-gun-.jpg

and if not that how about this

http://bitsofwar.com/2168-thickbox_b...hunder-gun.jpg

would suggest the forgeworld marine heavy weapons upgrades - get 4/5 of the same gun with a nice look to them...

They are ok, but I prefer the GW/FW models myself.

The thunder gun is better to represent, but, as above, I have not seen a GW heavy bolter that isn't better - except mebbe the plastics for Squats.