I, personally, would stick with the pa3x at least until I saw what the successor to the T4 looks like. Most likely it will have audio drums like the Audya and who knows what other improvements. I'm in the market for a new arranger right now but I won't buy one until I see what the next Yammy TOTL will be like. I prefer 76 keys but will accept 61 if the sound and feature set trumps it. As long as you're happy with the sounds, you can just learn the functions you need right now to enjoy playing. I think the Korg has great ergonomic design and is built very solid and looks good too. Good luck.