And develope jetpacks for onslaught mode - some interesting strategy twists there if done right. Not everone ones to jump into a flying vehicle in order to travers a whole map, you know
Sounds to me like you should just wait for Tribes: Vengence, as thats the game you describe above. You were able to skip over UT2K3 (which this, UT2K4, is a simple vehicle expansion of) so why not wait another 5 months or so.
I just played the SP demo for Painkiller (kicks ass) last night, that game will hold me over till HL2, Doom 3, SW: Battlefront and Tribes: Vengence comes out.