Considering that you've already heard the PA-80 and play the 740, if I were in your shoes, and especially if I played a fair selection of country music, I would wait to see what the PSR-2100 sounds like. I too have a couple 740s, but also have a pair of 2000s--and IMHO there's no comparison between the two--even when tuned.
Good luck,
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)