Rented Hitman:Blood Money and Battle for Middle Earth 2. Both are fun, but Hitman is really hard, even on the Normal setting. Battle for Middle Earth 2 is actually quite playable on the 360, despite the lack of a mouse and keyboard. The control layout is done very well, but there is some slow down when you've got a lot of troops on screen.
The cool thing is, unlike most other RTS games, when they say "huge army" they mean "huge army". Like any other game, you build a barracks and click once on the "soldier" button for one soldier, right?
Wrong.
Instead of clicking once per soldier, you click once for an entire battalion. That nets you somewhere around 100 troops per 5 clicks. They are 'built' pretty fast too. The resource gathering is also unique, as you don't need to harvest food/wood/all that other stuff seperatly. Instead you build a single structure to carry all that out for you. That also means less workers/builders running around, getting in the way.
I think I'll keep Blood Money until I finish it, since BlockBuster got rid of late fees, and actually buy Battle for Middle Earth 2, as the replay value is probably a bit higher, and you get online play.