Basically, I'm new to the whole world of keyboard and synth. I've been an active member on my church's worship team, both as a bassist and guitarist. But now, I feel called to venture into the realm of piano playing. We have a Yamaha piano in the church that I have been practicing on, learning how to change the upper and lower voices, layering another sound on top of it, etc. However, I'm just not getting the sounds that I would like to have. Not even relatively close. So I'm asking for some suggestions. I want to be able to do a variety of things, from a great grand piano sound, to doing strings and others sounds. I'm wanting to emulate (as much as possible within my budget) the sounds of Hillsong United, Kari Jobe, and Needtobreathe. I'm trying to stay relatively low in price, being that I'm just beginning to play (around three months of playing). I'm looking to spend around $500. No more than $700 though. Any suggestions would be appreciated. Thanks!