The Cypher sculpt is really nice I think, and it would give you a nice opportunity to work in some Heresy-scheme DA. Not sure how canon it would be to use the latest plastics though what with them being newer armour marks, can't say I've read into how GW get around that.
In time there's a chance that I'd play, but it's never been a big part of the hobby for me.
I would love to get some of the newer LotD models, but they're stupidly expensive on eBay.
Forgot to add a Vindicator and an old Chaplain on bike to the list