I'm actually debating with myself if CnC4 is worth the upgrade to my system, since it looks like it could run with RA3's requirements. The gameplay looks like it could turn out pretty good - I actually had a similar musing, though it didn't need to deploy (and was vastly more customizable than the Crawler).
I actually designed this thing, along with a few others assets, for C&C 4... yeah, they essentially wanted a fairly recogizble Mech upper torso on tank treads, LOL...
Which is sad. That's a RA3 unit.
but i do enjoy the nukes.