don't take this the wrong way, but you want to spend money on something that you have no idea about????

a little advice -

take a little time and do some research. The PXR4 has recording capabilities... did you know that? do you need that? does it have the effects that you want???

Decide what kinds of music you want to play, find musicians who play that style and see what they use. Narrow your chices down and then decide from there...

Hope this helps you...