Good midi keyboard recommendation? Need2 Change VST w/ pedal & non, Thinking of the Yamaha DGX-620 or YPG-635 Options

[crewxp]

I currently have a Yamaha YPT-400 Keyboard and I wanted to upgrade my midi capabilities. I want to do more with it, and sometimes when I press 5 keys at once, my VST gets distorted. (left hand stops even though Im holding the note. Not sure if that's keyboard related)

Anywho

I would like to be able to switch my VST's and also VST's different samples with my keyboard or a (pedal maybe?) I'm not sure if my current keyboard has that capability.

I've always wanted a good piano too. So I was thinking, is the Yamaha YPG-635 or (DGX-620) a good choice? Does anyone have any experience with it?

Or if you don't, do you know of a good midi controller that has that capabilties. Any brands in particular to look at?


Thanks a lot!!