#1
i cannot decide which guitar processor to buy among these.. please help me out!!!
#2
All of those are very old units. Is there some reason why those are your only options?
#3
Where are you from, what's your budget, current equipment and favoured genre?
Running through:

Engl Fireball
Engl Slanted Cab
Ibanez Xiphos
Schecter C-1 FR Black
Ibanez GRG (on its way)

Pedals:
Boss Noise Gate, Zakk Wylde Overdrive, Boss Tuner, Zakk Wylde Wah.
#5
None of those units are worth $150. It makes no sense that you would be considering any of them unless you are in a special situation that you aren't telling us. Like you live in Timbuktu and that's all that's available.
#8
The me 30 is a really old pedal. For $150, I would be looking at a used digitech rp355, a used line 6 pod 2.0, and a used rp500. I highly recommend the rp355. It has great effects, and good distortion and amp modeling.
Guitars: Fender FSR Standard Strat, Squire Affinity Strat, Epiphone Nighthawk
Amps: Vox AC15C1, Roland Cube 15x, Peavey KB-1
Pedals: Digitech RP355, HD500, Joyo AC-Tone, EHX Soul Food