It would be a bit easier for us if you threw up an 1850 point list you're thinking of using and then we can give you advice on that. Making lists for people isn't usually that helpful, I've found.
In general terms, veterans in Chimeras are still very popular and pretty effective, Leman Russ are cheap heavy firepower, and Valkyries and Vendettas are still pretty strong (though the Vendetta is pretty expensive to field these days). That said, there are a ton of different, viable lists you can make out of that pile of stuff. Fool around for a while and come back with something you think looks fun, then we can talk.