I too am new at this and interested in buying my first keyboard arranger, mainly for home and casual performance.
From what I have read over the past month I have decided on the Korg PA80 or the Yamaha PSR2000. Below are my 5 feature priorities (1 most important) and want to know if the higher cost of the Korg is justified:

1. Sound Quality- Is Korg really the first mid priced Arranger that is built on a professional sound engine? WOuld Yamaha use the PSR sound engine in their professional keyboards? (I know sound is subjective but overall impression is what I am looking for)
2. Keyboard Style Versatility- are we stuck with the built in styles; who has better support new styles; which has the better quality styles overall?
3. Inputs/Vocal effects/Karoake- Does one of these kayboards do an abviously better job when a mic is plugged in? Does the Yamaha have only 1 input? Which has the better Karoake functions?
4. Built-in speakers- is one obviusly better than the other or are they both similar in this area?
5. Sequencer- which has the better grade sequencer for importing/exporting and editing reqular sequences?

The difference in price becomes more apparent if I have to but the vocal/guitar input board for the Korg. What are some of the best prices in the USA?

Its a pretty tough request and I honestly dont know what to expect except that I honestly appreciate all the info I have already learned from this forum