Need a light 88 note keyboard to use with Mainstage for gigs?

I picked up an M-Audio Keystation 88es because it's light, inexpensive, and USB powered. It definitely is nice to carry an 88 key controller under your arm, however the feel of the keyboard is not very good. If like me you're willing to sacrifice feel for easier setup/teardown, saving your back muscles, and saving some money, I'd recommend it.

I've got one of these. Yep, it's 88 keys, and light. That's its forte. That's it. So sliders or knobs to do anything useful with within MainStage. Oh yeah, if you plug in a volume pedal, it sends controller #7 instead of controller #11, which is the usual... no prob, when starting up, press a couple of keys and you're good to go. The band I play with decided to part ways with the sax guy, so I'll actually probably add another one of these so that I'll have 3 controllers during gigs. So, what's the other controller then? An M-Audio KeyStation Pro... Also 88 keys, action ***** too, but in a different kind of way. It's heavy, and like the 88ES, has no aftertouch by the way...

I don't actually think there's an alternative out there at this price point that's 88 keys... Maybe a blowout Yamaha KX8???? supposedly a better feel, though the pitch and mod wheels sit "above" the keys instead of "left of.."

good luck on this

For weight considerations I use a Studiologic VMK-88.
The feel is one of the best I've encountered coming from an acoustic piano environment, BUT,
the latency renders it useless for changing patches in a live situation, the wizz-wheel is useless, so I use just the basic patch on the VMK-88 and change patches in MS1 with a foot switch.
The Numa-Nano arrives in France Jan 18th - the specs look good on paper - if it has the same nice touch and the electronic issues have been addressed, then it might warrant your attention.

http://www.fatar.com/Studiologic/Pages/NUMANANO.html

Good luck