I need a new amp

So my current amp (a behringer k3000-fx) has given me trouble lately. It makes harsh noise when nothing is plugged in and the volumes are all at zero. Yeah, I know, awesome. But not when you're trying to make stuff other than noise. Guitarcenter is giving me in-store enough in-store credit to buy another amp (the same type). That is $348.99. I don't think I want to get another one of those, seeing as the same thing might end up happening.

Currently, my options are:

1 - get the same kind of amp and hope it isn't messed up as well

2 - get one of these: http://www.guitarcenter.com/Roland-KC-150-Keyboard-Mixing-Amp-102216694-i1145263.gc

3 - get one of these: http://www.guitarcenter.com/Peavey-KB-4-75W-1x15-3-Channel-Keyboard-Amplifier-104007604-i1154527.gc

4 - get one of these: http://www.guitarcenter.com/Kustom-KMA65X-Keyboard-Mixer-Amplifier-481239-i1145537.gc

if I would get any of the other amps, I would probably get cabinets eventually (seeing as the behringer is 300 watts and these are either 65 or 75 watts) to boost the sound for live shows.

please help me out in deciding.

Rubbish found all his amps for fucking free.

I only hope I'm that lucky.
Oh yeah, and sorry but I have no clue what you should do.

spend your store credit on pedals and find an old shitty amp elsewhere that doesn't cost much. i'm surprised that amp lasted you as long as it did, noise goes through gear really quick.