It looks damn fine to me dude. Though ultimately it depends on what 'level' you want to paint them to. If you're going for a tabletop standard I would leave it there though you could add an extreme highlight to really make it pop, especially on the helmet. My only criticism would be the metallics on the plasma gun,the jump in highlights is a bit too strong, I'd start again from black (but leave the blue plasma accelerator) and do a very, very light drybush of your darkest metallic and then an extreme highlight of something like mithril silver or its equivalent, trying to avoid large areas like you've shown here like the stock and hand grip. You've managed to keep it neat and clean which is the first and best piece of advice you can give any newbie. Props on the eye lenses,they look really good. Looking forward to what you show next.